Mathematics, statistics 150

Question

Consider the probability model with sample space {A,B,C} and P(A)=0, P(B)=0.3, P(C)=0.7.then

(a) P( A or B)=

(b) P(B and C)=

Answer 1

(a) P( A or B)=P(A)+P(B) = 0+0.3 = 0.3

(b) P(B and C)=P(B)*P(C) = (0.3)(0.7) = 0.21