Question

Twenty distinguishable balls are placed at random in six boxes that are labeled as b1, . . . , b6. find the probability that boxes with labels b1, b2, and b3 all together contain six balls

Answer 1

Here in one box their are 20 balls
Therefor in box b1 b2 b3 their are 30 balls .*. Favourable = 6

.*. P(A) = favourable / total
= 6/30 = 1/5 = 0.5

Hence answer is 0.5