Question

Ritwik draws a ball from a bag that contains white and yellow balls. the probability of choosing a white ball is 2/9 if the total number of balls in the bag is 36, find the number of yellow balls.​

Answer 1

Answer:

Given,

probability of choosing a white ball = 2/9 = 8/36

36-8= 28

So,

Probability of getting a yellow ball is 28/36.

Answer 2

Answer:

let the number of yellow balls be x

then the number of white balls=36-x

probability of choosing a white ball=36-x/36

according to question 36-x/36=2/9

or, (36-x)9=36×2

or, 36-x = 72/9

or, 36-x = 8

or, x = 36-8

or, x = 28

thus, the number of yellow ball is 28