Question

Find the probability that a number selected at random from the numbers 1, 2, 3, ..., 35 is a multiple of 7.

Answer 1

Total no. of possible outcomes = 35 {1, 2, 3, ..., 35}

E ⟶ event of getting no. which is multiple of 7

No. of favourable outcomes = 5 {7, 14, 21, 28, 35}

Probability, P(E) = `"No. of favorable outcomes"/"Total no. of possible outcomes"`

P(E) = `5/35`

= `1/7`