Abag contains 10 red marbles, 15 yellow marbles, 5 green marbles, and 20 blue marbles. five marbles are drawn from the bag. what is the approximate probability that exactly two of the five are blue?

0.3641

Step-by-step explanation:

Given that a bag contains 10 red marbles, 15 yellow marbles, 5 green marbles, and 20 blue marbles

When five marbles are drawn from the bag, we have to find the probability that exactly two of the five are blue.

=Probability that 2 blue marbles and 3 non blue marbles

2 marbles should be drawn out of the 20 blue marbles and 3 non blue marbles out of 30 marbles

No of ways = 20C2 (30C3)

Total no of ways of drawing 5 marbles = 50C5

Hence probability =

if you was gonna solve for a, a is a   < -12