If P(A) = 0.80, P(B) =0.70 and P(A or B) =0.90, then P(A and B) is:
a. 0.10.
b. 0.14.
c. 0.60.
d. 0.72.
Question 2
A sample space is composed of three outcomes, called A, B, and C. Outcome A is twice as probable as B, and B is twice as probable as C. The probabilities of A, B, and C would be:
a. P(A) = 0.5; P(B) = 0.33; P(C) = 0.167.
b. P(A) = 0.4; P(B) = 0.4; P(C) = 0.2.
c. P(A) = 0.57; P(B) = 0.286; P(C) = 0.143.
d. Insufficient information given to determine answer.
