In an entrance test that is graded on the basis of two examinations, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing atleas

Answer

N/a

Explanation

Let `A=` event of passing in I examination
`B=` event of passing in II examination
Given that `P(A)=0.8, P(B)=0.7`
and `P(AuuB)=0.95`
Now `P(AuuB)=P(A)+P(B)-P(AnnB)`
`implies0.95=0.8+0.7-P(AnnB)`
`implies(AnnB)=0.55`
`:.` Probability that hte selected student is passing in both examination `=0.55`