Question

Probability of a to fail in a exam is 0.2, and that of b is 0.3, probability that either of them will fail is

Answer 1

P(A⎯⎯⎯⎯)=0.2 P(A)=1−0.2 = 0.8 P(B⎯⎯⎯⎯)=0.3 P(B)=1−0.3=0.7 P(A⎯⎯⎯⎯∪B⎯⎯⎯⎯)=P(A∩B⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯) =1−P(A∩B) 1−P(A)P(B) 1−(0.8)(0.7) =0.44 HOPE ITS HELPFULMARK AS BRAINLIEST THANKS

Answer 2

Given P(A) = 0.2 and P(B) = 0.3 then P(A int B) = 0.3 * 0.2 = 0.06

          P(A U B) = 0.2 + 0.3 - 0.06

                         = 0.44.