Question

Two digits numbers are formed from the digits

5,6,7 without repetition.then find the probability

that the numbers so formed are divisble by 3.​

Answer 1

Let s be the sample space.

s={56,57,65,67,75,76}

n(s)= 6

condition for event A: number divisible by 3

A={57,75}

n(A)= 2

p(A) = n(A)÷n(S)

p(A) = 2÷6

p(A) = 1÷3