Question

The probability of gusseing the correct answer of a question is x/5 if the probability of guseeing wrong answer is8/10 then find the value of x

Answer 1

P(E) correct ans.=x\5

P(E)wrong ans=8\10            -----------------------(1)

Total outcomes are 10       ---------------(from 1)

therefore

x\5=2x\10

therefore

2x+8=10

2x=2

x=1

Regards Mihir.Thacker