A) 4
B) 5
C) 6
D) 3
Correct Answer: D
Solution :
Let each of the friend have \[x\] daughters. Then the probability that all the tickets go to the daughters of \[A\] is \[\frac{{}^{x}{{C}_{3}}}{{}^{2x}{{C}_{3}}}.\] Therefore \[\frac{{}^{x}{{C}_{3}}}{{}^{2x}{{C}_{3}}}=\frac{1}{20}\Rightarrow x=3.\]You need to login to perform this action.
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