Question

A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at randam.What is the probability that the marble taken out wil be not green?

Answer 1

Total number of marbles = 5 + 8 + 4 = 17 

Number of green marbles = 4 

Probability of getting a green marble = `" Number of favourable outcomes "/"Total number of outcomes "` = `4/17`

Probability of not getting a green marble  = `1-4/17 = 13/17`