Answer: 0.9985
Step-by-step explanation:
8 red balls
10 green balls
12 yellow balls.
Re: probability = favourable outcome/possible outcome.
To get probability of at least one yellow ball being chosen, we first get the probability that no yellow ball is chosen and subract the answer from 1.
Doing this,
Favourable outcome = number of ways to pick the balls without considering a yellow ball = 18C10
Possible outcome = number of ways to pick 10 balls without restrictions = 30C10
Probability of not choosing a yellow ball = (18C10)/(30C10)
= 43758/3.005 * 10^7
=0.0015.
Hence, probability of choosing at least one yellow ball = 1 - 0.0015 = 0.9985.
