Question

There are 12 white, 7 red and 11 black balls in a box. Again there are 7 white, 10 red and 13 black balls in another box. Now if you pick up one ball from each of the box independently what will be the probability of getting –
i) Two white balls?
ii) Two red balls?
iii) Two black balls?​

Answer 1

Step-by-step explanation:

total balls in first box is 12+7+11 = 30

total balls in second box is 7+10+13 = 30

I) two White balls = 12/30 × 7/30

ii) two red balls = 7/30 × 10/30

iii) two black balls = 11/30 × 13/30