Question

A bag contains 10 blue and 20 red balls. A ball is drawn from the bag without looking into it. Find the
probability of drawing (i) a red ball (ii) a blue ball.

Answer 1

probability of red balls : 30/20

probability of blue balls : 30/10

Step-by-step explanation:

probability of red balls : total no of balls divided by particular colour of ball

Answer 2

Step-by-step explanation:

(i) Total no of balls = 10+20=30

No of favourable outcomes = 20

$P( Red \: ball ) = \frac{no \: of \: favourable \: outcomes}{total \: no \: of \: outcome \: possible} \\ = \frac{20}{30} \\ = \frac{2}{3}$

(ii) Total no of balls = 10+20=30

No of favourable outcomes = 10

$P( blue \: ball ) = \frac{no \: of \: favourable \: outcomes}{total \: no \: of \: outcome \: possible} \\ = \frac{10}{30} = \frac{1}{3}$

Om Namah Shivaya

Debasish Biswal