On a test, a student got 80% of the items correct. If the Student got 56 items correct, how many items were on the test?

Q: if a test is weighted at 25% and I make a 55 on the test with my current grade being a 82, would is…

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Q: in the U.S, 37% of households have dogs, 30% of households have cats, and 7% of households have both…

A: Addition rule of probability:Addition rule of probability indicates the happening either of the…

Q: A basketball player has a 60% chance of making each free throw shot. How many free throws would he…

A: Question based on probability. Probability = number of favourable outcome/.…

Q: Approximately 10% of students have a composite score below what level

A: If X is the composite score of the students, then we need to search for a x, such that P[X≤x]=0.1.

Q: How many adults were questioned? What percentage of the adults questioned had 5 children?

A: The given bar graph represents the number of children the adults have in their families. From the…

Q: To estimate the number of bass in a lake, a biologist catches and tags 24 bass. Several weeks later,…

A: The objective is to determine the number of bass in the lake. Let the number of bass in the lake is…

Q: In a class with 25 student there are 6 student very talentet in the subject of art. What percentage…

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Q: Out of 45 students, 29 go on a field trip. Which best represents the percent of the students who do…

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Q: In a mathematics class, eighteen students received an A on the third test, which is 150% of the…

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Q: In a game of chips, Paul lost half of his chips in the first round, won 50 chips, then lost half his…

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Q: A soccer team won 24 of 36 games in the first season. If the team had the same ratio of wins to…

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Q: The state transportation commission counted cars traveling east and west across a toll bridge. The…

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Q: A survey of 150 people revealed that 115 people like ketchup on their hot dogs, 85 people like…

A: Concept of General Addition Rule: For any two events A and B the General Addition Rule state that:

Q: . In Exton School, 60% of the boys play football and 36% of the boys play ice hockey. Given that40%…

A: Let us define the events as, A: Boys who play football.B: Boys who play ice hockey. From the given…

Q: a survey found that 75,000 people own a car. This was 75% of the respondents in the survey. What was…

A: Given data: The given people that own a chair are C=75,000. The given percentage is p=75%.

Q: In a survey of 1536 adults, 36% responded "yes" to the survey question. How many adults answered…

A: From the provided information, Sample size (n) = 1536 36% responded “Yes” to the survey question.…

Q: We made a survey with the number of people in a household and the number of times they get sick…

A: Solution: Let x be the number of people in a household  y be the number of times they get sick in a…

Q: A recent study of young executives showed that 30 percent run, 20 percent bike and 12 percent do…

A: Note: Hi there! Thank you for posting the questions. As there are several independent questions,…

Q: probability of observing at least 30 heads in 100 tosses? . Try computing the answer for a smaller…

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Q: If this test had 13 questions, how many ways could you get 7 questions correct? Answer:

A: Given:  Test had 13 questions    To Find:  Number of ways that 7 questions are correct

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: A survey was given to 90 high school students. They were asked if they preferred fiction or…

A: so, let no. if outdoor Non-fiction be "x" total indoor + total outdoor =9050+ (30+ x )=9080+x=90x=10…

Q: In a mathematics class, 21 students received an a on the third test, which is 175% of the students…

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Q: on a multiple choice test with 20 questions, each question has 4 possible answers, one of which is…

A: We have to find mean  for students who guess at all  correct answers..

Q: if 540 people preferred walking and 900 people were surveyed how many people preferred running.

A: Given,    People preferred walking = 540 people surveyed are 900.   Calculations,    900 - 540 = 360

Q: On four exams,Wallace's grades were 79,93,91 and 68. what grade must he obtain on his fifth exam to…

A: Let Wallace's grade in the 5th exam be x.

Q: At a conference, after everyone had shaken hands with everyone else, it was found that 45 handshakes…

A: This is a problem related to permutation and combination. Based on the general formula and concept…

Q: What percentage of people are men who like movies?

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Q: Out of 45 students, 29 go on a field trip. Which best represents the percent of the students who do…

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Q: A cafeteria manager surveyed a random sample of students at a school to determine which of 2 meal…

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Q: or a particular event, 697 tickets were sold for a total of $5250. If students paid $6 per ticket…

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Q: Out of 800 families with 5 children each, how many would you expect to have, (i). 3 boys (ii) Either…

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Q: Out of 1000 people surveyed, 850 said they like chocolate.  What proportion of people surveyed said…

A: Given: The total number of people surveyed is 1000 850 people said they like chocolate We have to…

Q: A survey of 1179 adults nationwide  asked what irks you most about The actions of other Motorist"The…

A: Given: Number of People surveyed=1179 People voted for tailgater=796 To find: Percentage(x).

Q: A school knows that 38% of its incoming students own a smart phone and a tablet. What percent of…

A: Let S be the set of students with smartphone and T be the set of students with tablet Percentage of…

Q: Ben is studying photography, and he was asked to submit 6 photographs from his collection to exhibit…

A: Combinations: The number of combinations of r items selected from n items is, nr=n!n-r!r! Ben has 15…

Q: In the upcoming election for governor, the most recent poll, based on 900 respondents, predicts that…

A: From the given information, In the upcoming election for governor, the most recent poll, based on…

Q: During a basketball practice mai attempted 40 free throws and was successful on 25% of them. How…

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Q: A survey of 1104 adults nationwide asked, what irks you most about the actions of other motorists?…

A: Percentage is the ratio of people responded tailgators to the total people surved.

Q: On a recent survey, 60% of people said they preferred walking to running. If 540 people liked…

A: Number of people who liked walking = 540 Percentage of people who like walking = 60%

Q: At an auction, the auctioneer estimated that 40% of the audience was from within the state. Eight…

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Q: On a test, if 115 questions are answered and 41% of them are correct, what is the number of the…

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Q: Find the probability of selecting either a non-smoker or a woman when you select a person at random…

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Q: The campus demographics state of 40 percent of students are male if there are 300 students, then how…

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Q: On a quick survey, respondents had to pick their favorite dessert from ice cream, cake, chocolate,…

A: Let's find.

Q: A survey found that 31% of Americans watch the fireworks on the 4th of July from their TV. If 20…

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Q: On a quick survey, respondents had to pick their favorite dessert from ice cream, cake, chocolate,…

A: Fraction of respondents pick ice-cream=25Fraction of respondents pick chocolate=13Fraction of…

Q: On a test, 95% of the questions are answered correctly.  If 57 questions are correct, how many…

A: The aim is to find the number of questions on the test.Here, the number of question answered…

Q: A chess club with 40 members is electing a new president. Deshaun received 36 votes. What percentage…

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Q: Find the percentage of scores of the following

A: Given,μ=0s=1

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.