Question

A bag contains while,black and red balls
only. A ball is drawn at random from the
bag. If the probability of getting
white ball is 3/10 and that of a black
ball is 2/5 , then find the probability of
getting a red ball. If the bag contains 20
black balls, thin find the total number of
balls in the bag.
​

Answer 1

red bol 3 by 10

50 total number of ball

Answer 2

Step-by-step explanation:

let total balls be x

2/5=20/x

x=50 balls

let y number of white balls

3/10=y/50

y=15

total no.of red balls=50-20-15=15

probability of getting red=15/50=3/10