There are 3230 students, each with 1 student card. All of them place their student cards into a box, then a professor randomly distributes 1 card to each student. What is the expected number of students that receive their own card back?

Q: A section of a test has four true-false questions. A completed test is selected at random and the…

A: To find out all the 16 outcomes:

Q: A keyboard has 7 keys: letters A-G. Suppose that a melody is created by playing four random keys.…

A: the 7th key can not be E,F,G. Hence for the 7th key we are left with only 4 choices.

Q: A committee consists of 4 men and 5 women. Three members are to be selected at random to form a…

A: Given that  Committee consists of  4 Men and 5 Women  Then we have to choose 3 members to be…

Q: In a random sample of 100 scholars, 47 scholars selected King for Vice President . If the total…

A:

Q: ains 5 red,4 white and 3 blue balls .3 balls are drawn at random. find out the number of ways of…

A: The box contains 5 red , 4 white and 3 blue balls.  It is given that 3 balls are drawn at random…

Q: Jason, Lewis, and Nora will be placed in a line along with 7 other people. What is the probability…

A: Total number of persons = 10 First we have to determine the total number of ways in which 10 persons…

Q: Find the probability of getting 8 heads in a row in 8 tosses of a fair coin.

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Q: There are 25 students in a science class. Twenty percent of the students are randomly chosen to…

A: Solution :  There are 25 students in a class.  Twenty percent of the students are randomly chosen…

Q: A math teacher chooses   8    students at random from a class of   38  to solve a problem at the…

A:

Q: If 15 people start a race, in how many different ways can the top 3 finishers be determined?

A: Permutation:   It  is an arrangement of objects in a definite order where the order is important.…

Q: In a survey of 121 pet owners, 47 said they own a dog, and 79 said they own a cat. 36 said they own…

A: Given that Total pet=121, Cat=79, Dog=47, both Cat and dog=36

Q: In a hand of poker, 5 cards are dealt from a regular deck of 52 playing cards. How many different…

A: Given,Total no.of cards=52no.of club cards=13no.of hearts=13

Q: In a survey of 1000 students it was found that 840 own a cell phone, 450 own an MP3 player and 370…

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Q: Suppose that the number of students in a class increase by 2, the number of ways they may be…

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Q: a three digit number is made by choosing 2,3,5,7,8. what is the probability that the number chosen…

A:

Q: An urn contains 6 green balls and 7 red balls. A man selects balls at random without looking at…

A:

Q: A survey found that 58% of American adults said they use the Internet. If 20 American adults are…

A: Answer - A survey found that 58%   i.e P = 0.58               n= 20,    x = 12

Q: There is money to send four of seven student council members on a trip to Washington DC. All want to…

A: Given Information: Number of members = 7  Number of members to be send for trip = 4

Q: In a classroom there are 28 tablets which includes 5 that are defective. If seven tablets are chosen…

A: No.of defective tablets=5No.of non defective tablets=23

Q: A baseball team has 13   players. How many 9​-player batting orders are​ possible?

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Q: A researcher wanted to test eight specific drugs and he had enough animals to test five drugs. How…

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

Q: 40 yellow balls and 40 blue balls are in a single bag. If 5 random balls would be selected,…

A: Given data: 40 yellow balls and 40 blue balls are in a single bag. If 5 random balls would be…

Q: A shipment of 520 calculators, 16 are found to be defective. How many defective calculators are…

A:

Q: You are a professor of journalism and have 14 students in your class. How many ways can you line up…

A: Given,total no.of students=14

Q: Four people are sitting around a table.  Every person gets 5 cards from 52 cards.  What is the…

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Q: A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Write the probability…

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Q: There are 7 students performing in the talent show, 5 of whom will perform a monologue. If 4…

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Q: A college has 6 Male professors, 15 female professors, 6 Male teaching assistants, 15 female…

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Q: A committee of 5 people will be selected at random from a group of 12 men and 15 women. How many…

A: we have to find no. Of ways..

Q: In a classroom there are 28 tablets which include 5 that are defective. If seven tablets are chosen…

A: In a classroom there are 28 tablets which includes 5 that are defectiveTotal number of tables…

Q: Determine, to the nearest hundredth, the probability that Max will draw 2 non-defective chips.

A: It is given that Number of defectives = 5 Number of non-defectives = 175 - 5 = 170 Total = 175