If the probability for A to fail in an examination is 0.2 and that for B is 0.3, then the probability that either A or B fails, is

Options

A. `0.5`
B. `0.44`
C. `0.8`
D. `0.25`

Answer

B

Explanation

Here, A and B are independent events.
`therefore P(A nn B)=P(A).P(B)=0.06`
Now, `P(A uu B)=P(A)+P(B)-P(A nn B)`
`= 0.2 + 0.3-0.06 = 0.44`