If P(A ) = .55, P(B ) = .4, P(A B ) = .22, and A and B are ...

[geodog55]

If P(A ) = .55, P(B ) = .4, P(A  B ) = .22, and A and B are independent events, find P(B ).
 
  A) .88 B) .55 C) .22 D) .4

Question 2

We believe that 81 of the population of all Business Statistics students consider statistics to be an exciting subject. Suppose we randomly and independently selected 39 students from the population.
 
  How many of the sampled students do we expect to consider statistics to be an exciting subject?
  A) 39 B) 31.59 C) 33.82 D) 32.16

[dellikani2015]

Answer to Question 1

D

Answer to Question 2

B

[geodog55]

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[dellikani2015]

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