Question

In a survey of 400 youngsters aged 16-20 years, it was found that 191 have their voter ID card. If a youngster is selected at random, find the probability that the youngster does not have their voter ID card.

Answer 1

Here n(S) = 400

Number of persons having voter ID = 191

Number of persons does not have their voter ID

= 400 – 191

= 209

n(E) = 209

P(E) = `("n"("E"))/("n"("S"))`

= `209/400`

∴ The required probability is `209/400`