engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Engineering Mathematics Probability and Statistics Types of Probability
A box contains 5 red marbles, 8 green marbles, 11 blue marbles, and 15 yellow marbles. We draw marbles uniformly at random without replacement from the box. What is the minimum number of marbles to be drawn to ensure that out of the marbles drawn, at least 7 are of the same colour?
1
7
2
8
3
23
4
24