Suppose you have a group of 12 British people and 18 Americans. What is the probability of randomly selecting a four-person committee consisting entirely of Americans? Round to 4 decimals.
It is given that we have a group of 12 British people and 18 Americans. We have to choose 4 random people to form a committee.
We have to find the probability of randomly selecting a four-person committee consisting entirely of Americans. In other words, we have to find the probability such that in a committee there is all American person. So,
There are total 18+12=30 person group.
Total no. of cases=30C4 and total no. of favourable cases= 18C4*12C0. Thus,
Required probability =
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