In a certain class of 25 students, 12% received A’s, 30% received B’s, 42% received C’s, and 12% received D’s.  How many students failed the class?

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A: It is given that the proportion of the graduating seniors took the ACT exam is 0.28, the proportion…

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A: The union of events A and B is defined as n(A ∪ B) = n(A)  + n(B) – n(A ∩ B).

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A: solution of the given problem is below...

Q: .On a particularly boring transatlantic flight, one of the passengers amused himself by counting the…

A: let B: black haired Let W :  whole row n(B ∪ W) = 37n(B) =33n(W) = 6

Q: What percentage of those sampled had high blood pressure? What percentage of those sampled were over…

A:

Q: One common system for computing a grade point average​ (GPA) assigns 4 points to an​ A, 3 points to…

A: The information is provided as:

Q: If a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many…

A: Given : n = 13 p = 0.25 q = 0.75

Q: In your school, 40% of students watch TV at night. You randomly ask 5 students every day if they…

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A: Given,   The sample proportion is,

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A: It is given that a manufacturer of electric bulbs sends out 500 lots each consisting of 100 bulbs.…

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A: number of different type of buns=9 number of different type of cheeses=7 number of different  type…

Q: one family has comfortable children, with four daughters and two sons from a village of 1000 houses,…

A: As per given by the question, one family has comfortable children's with four daughter and two son…

Q: The average age of a group of students is 12 years old. There are only 11-year- olds and 14-year…

A:

Q: In a certain village 20% of the population is literate, and assume that 150 investigators take a…

A: Given,n=10p=0.2q=1-p=1-0.2=0.8X=no.of literates in the sampleX~Binomial (n=10 , p=0.2)P(X=x)=cxn px…

Q: Both 50% marksmen, Cj and Jc agree to a firefight in which they alternate shots until one of them is…

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Q: How likely is it for a vehicle to have an accident history if it was known to be a car or a bus?

A: Here complete table

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A: The total number of players are 12. The team formed should be of 6 players. Therefore, 6 players can…

Q: In a recent survey of 100 students, 38 said that they took a Math class as a freshman, 49 said that…

A: Follow 2nd step.

Q: Question1:-If 6 seats are empty in a train box and two man entered in this coach than they seated…

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Q: In a survey of 50 music lovers, 18 enjoyed classical music, 29 enjoyed popular music, and 14 enjoyed…

A: see below the answer and calculation

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A: we have to find out expected value..

Q: d.If the true percentage is 10% and this obstetrician has 146 pregnant women under his care, how…

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Q: Suppose 55 percent of the customers at Plzza Palooza order a square plzza, 77 percent order a soft…

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Q: One common system for computing a grade point average​ (GPA) assigns 4 points to an​ A, 3 points to…

A: This is weighted mean problem. The following information in table form is shown on board:

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Q: If a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many…

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Q: According to FBI data, 12% of burglaries.   What should we conclude if the detective clears all…

A: Introduction to binomial distribution: Consider a random experiment involving n independent trials,…

Q: vendor sells twenty-four sweatshirts for $15 each, fifty-one t-shirts for $10 each, and thirteen…

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Q: Of the trains that recently arrived at Hampton Station, 4 were on time and 2 were late. Considering…

A: It is an important part of statistics. It is widely used.

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A: In first round one text message was sent to two people. In second round, two people send two text…

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Q: In a survey conducted by Helena, a financial consultant, it was revealed that of her 400 clients,…

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Q: if a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many…

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Q: In a cohort of 25 graduating students, there are 3 different prizes to be awarded. If no student can…

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Q: In a fertility clinic, 40% of the women patients did not become pregnant, 30% had a singleton birth,…

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Q: From a group of 20 nurses, 4 are to be selected to work a night shift. In how many ways can this be…

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Q: Suppose thirty-two students signed up for classes during an orientation session. If exactly twenty…

A: Follow the next steps for the solution. The detailed step by step solution by Polya's problem…

Q: The average age of the students in Class A is more than 11 years old. If ten out of the eleven…

A:

Q: If a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many…

A: Solution

Q: One common system for computing a grade point average​ (GPA) assigns 4 points to an​ A, 3 points to…

A: Note: Hi there! Thank you for posting the question. Seems like your question has repeated numbers in…

Q: For the purposes of a marketing research, a survey of 100 women is conducted in a town, The results…

A: The complement of set A is A' and it is defined using the formula, A'=E-A, where, E is the universal…

Q: Can you do this problem?

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A: Here we have to solve the following problems using Polya's problem-solving steps.

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A: According to the provided data, 60% of the seats are booked and 15% of these do not end up showing,…

Q: Suppose thirty-two students signed up for classes during an orientation session. If exactly twenty…

A: Given that: Total number of students = 32Number of students signed up for chemistry =20Number of…

Q: In a class, 96% students have at least one smartphone, 98% have a calculator, and 95% have a…

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Q: neither an iPhone nor an iPad. Twenty percent use an iPhone, while thirty percent use an iPad. How…

A: