Question

13. A bag contains 30 white balls, 20 red balls, 40 black balls If ball is taken
out at random, find the probability of getting a red ball​

Answer 1

Step-by-step explanation:

A = no. of ways to drawing a ball from bag

= 30+20+40 = 90C1

B = no. of ways of drawing a red ball = 20c1

p(B) = 20C1/ 90 C1 = 20/90 = 2/9

Answer 2

Answer :-

Probablitity = 2/9.

Explanation :-

Given :

• Red Balls = 20.
• White Balls = 30.
• Black Balls = 40.
• Total Balls = 20 + 30 + 40 = 90.

To Find :

• Probability of getting a red ball.

Solution :

We know that,

Probability = Fav. Outcomes/Total Outcomes.

Here,

Favourable Outcomes = 20.

Total Outcomes = 90.

➞ Probability = 20/90.

➞ Probability = 2/9.

∴ Probability of getting a red ball = 2/9.