Question

two digit numbers are formed from the digit 2 5 7 without repetition complete the following activity to find the probability that the numbers so formed are divisible by a(3) b (5)​

Answer 1

Step-by-step explanation:

no formed are

S={25,27,52,57,72,75}

n(S) =6

a) no. divisible by 3

A={27,57,72,75}

n(A) =4

prob(A) =n(A)/n(B)

=4/6

=2/3

b) no. divisible by 5

B={25,75}

n(B) =2

prob(B) =n(B) /n(A)

=2/6

= 1/3