ll variable with a 3, 5 and covariance 4,find the variance Y t 12. of Ans (3) A

Question

ll variable with a 3, 5 and covariance 4,find the variance Y t 12. of Ans (3) A man tosses 2 half dollars, 3 quarters, 3 dim and 4 nickels among 12 girls, in how many differe (4) ways can the girls profit, if each is to get a coin? Ans (4) that buys a jac (5) Wendy is making some purchases at a department store, the probability new or a shirt is 15, if the probability that she buys shirt only is i the probability that she Lat only is 15 What is the probability that she buys a shirt and jacket? a

Explanation / Answer

4)

This is like no. of ways of distributing amongst 12 girls , the 2 $.5, 3 $.25, 4 nickels.

This can happen in 12!(2!3!3!4!)

= 277200 ways of doing so.

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