SOLUTION: The Red Cross honors and recognizes its best volunteers from time to time.
One of the Red Cross offices has received 12 nominations for the next group
of 4 volunteers to be rec
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One of the Red Cross offices has received 12 nominations for the next group
of 4 volunteers to be rec
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Question 1177246: The Red Cross honors and recognizes its best volunteers from time to time.
One of the Red Cross offices has received 12 nominations for the next group
of 4 volunteers to be recognized. Eight of these 12 nominated volunteers are
females. If the Red Cross office decides to randomly select 4 names out of
these 12 nominated volunteers, find the probability that of these 4
volunteers
a. exactly 3 are females
b. exactly 1 is female
c. at most 1 is female Answer by ewatrrr(24785) (Show Source):
Hi
12 people: 8F and 4M
select 4 names: 12C4 all the ways this can be done.
P(exactly 3 are females) = (8C3)(4C1)/(12C4)
P(exactly 1 is female) = (8C1)(4C3)/(12C4)
P(at most 1 is female) = 1- P(no females) = 1 - (4C4)/(12C4)
Wish You the Best in your Studies.
