Question

In a bag there are 50 balls , some are red , some are white and some are green . A ball is from the bag randomly .If the probability of selecting a white ball and green ball are 2/5 and 3/10 respectively,then the number of red ball is:

Answer 1

Answer:

15 balls

Step-by-step explanation:

total number of outcomes =50

number of white ball = 20

number of green ball = 15

So, Number of red ball= 50-20+15=15

Answer 2

Answer:

15 is answer

Step-by-step explanation:

1. number of white balls =2/5*50=20
2. number of green balls=3/10*50=15
3. total of 1 and 2=35
4. now red balls =50-35=15