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Answer:
Consider the following events :
A = selecting a fair complexioned student
B = selecting a rich student
C = selecting a girl
We have,
P(A)=
80
20
=
4
1
P(B)=
80
10
=
8
1
P(C)=
80
25
=
16
5
Since, A, B, C are independent events. Therefore,
Required probability = P(A∩B∩C)
=P(A)P(B)P(C)=
4
1
×
8
1
×
16
5
=
512
5
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