Question 705001
SCQMEDIUM
A large number of birds, half of which belong to specie A and the other half to specie B, rest on a tree where they are distributed randomly across the branches. In a random sample of 5 birds from the tree, what is the probability that at least one is from specie A?
(A)
0.03125
(B)
0.15625
(C)
0.84375
(D)
0.96875
Detailed Solution
The probability of a bird being from species A is . The probability of a bird not being from species A is .
For 5 birds, the probability that none are from species A is . The probability that at least one is from species A is .
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