Question

Rithvik draw 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

Total number of ball is 36

probablity of white ball is 8/36=2/9

so, probablity of yellow ball is 28/36=7/9

7/9+2/9=9/9=1

Answer 2

Total Number of Ball=36

We know Probability

$\frac{favourable \: outcomes}{total \: outcomes}$

Probability of Choosing White ball

$\frac{2}{9}$

Total White Ball

$36 \times \frac{2}{9} \\ = 8 \: balls$

Total White balls=8

Yellow ball=36-8

=28

Total Yellow Ball=28