Question

a bag contains white red black only a ball is drawn at random from the bag if the probability of getting white ball is 3/10 and that of the black ball is 2/5 then find the probability of getting red ball if the bag contains 20 black balls then find the total number of balls​

Answer 1

Answer:

50

Step-by-step explanation:

Answer 2

well let the no. of balls= x

prob. of getting a white ball= 3/10

Prob of black ball=2/5

no. of black balls= 20