A 30-question multiple choice test consists of 20 questions with four answer choices each and 10 questions with five answer choices each.  What is the expected number of correct answers that would result from random guessing?

 

Suppose that a jar contains 4 pens: 2 black, 1 blue, and 1 red.  Three people select a pen at random from the jar, sign a document, and replace the pen in the jar before the next person selects a pen.  What is the probability that none of the people use the red pen to sign the document?

 

An unfair coin comes up heads 53% of the time that it is flipped.  If the coin is flipped 12 times, what is the probability that it comes up heads exactly 6 times?

 

It is known that when a particular 4-sided die is rolled, a 1 will come up 30% of the time, a 2 will come up 20% of the time, a 3 will come up 20% of the time, and a 4 will come up 30% of the time.  If the die is rolled a total of four times, what is the probability that it comes up 4 on at least three of the rolls?

 

 

Suppose that 1,000 tickets are sold for a raffle.  If there is one prize of $2,500, two prizes of $500, four prizes of $100, and thirteen prizes of $20, what is the expected value of a raffle ticket?

 

 

Suppose that you play a game where you roll a fair standard 6-sided die and based on the outcome you either win or lose money.  If you roll a 6 you win $20 and if you roll anything other than a 6 you lose $3.  If you play this game three times, what is the expected value of your winnings?

 

A restaurant manager estimates the likelihood that a newly hired waiter will still be working for the restaurant six months later is 60%.  If five new waiters are hired, what is the probability that at least four of them will still be working at the restaurant six months later?

 

 

AccountingQueen

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Status NEW Posted 13 Aug 2017 04:08 PM My Price 10.00

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