SOLUTION: From a group of 7 people, you randomly select 3 of them. What is the probability that they are the 3 oldest people in the group?

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Question 1081214: From a group of 7 people, you randomly select 3 of them.
What is the probability that they are the 3 oldest people in the group?
Found 2 solutions by josmiceli, ikleyn:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
the 3 oldest are 1 of the combinations in:
C( 7,3 ) = +7%21+%2F+%28+3%21+%2A+%28+7-3+%29%21+%29+
C( 7,3 ) = +7%21+%2F+%28+3%21+%2A+4%21+%29+
C( 7,3 ) = +%28+7%2A6%2A5+%29+%2F+%28+3%2A2%2A1%29+
C( 7,3 ) = +35+
The probability is 1/35
Get another opinion if needed

Answer by ikleyn(52802) About Me  (Show Source):
You can put this solution on YOUR website!
.
What if all the people in the group are of the same age ?


As posted, The formulation is incorrect, since it is not full.