SOLUTION: A fisherman has 18 different trout flies. How many different selections of 2 flies each can he make?

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Question 1197928: A fisherman has 18 different trout flies. How many different selections of 2 flies each can he make?
Answer by greenestamps(13215) About Me  (Show Source):
You can put this solution on YOUR website!


"18 choose 2"

C%2818%2C2%29=%2818%2A17%29%2F%282%2A1%29=9%2A17=153

ANSWER: 153