#1) Suppose A and B are two events with probabilities:

P(A)=.30,P(B)=.30,P(AB)=.10.

Find the following:

a) P(AB).

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b) P(A^c).

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c) P(B^c).

#2) Suppose you are going to make a password that consists of 5 characters chosen from {1,2,4,9,d,i,k,m,n,w,z}. How many different passwords can you make if you cannot use any character more than once in each password?

#3) Find the answer to each of the following by first reducing the fractions as much as possible:

a) P(490,2)=

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b) C(670,665)=

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#4)

Exam Page 4

Suppose A and B are two events with probabilities:

P(A^c)=.45,P(B)=.45,P(AB)=.20.

a) What is (AB) ?

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b) What is (BA) ?

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