9514 1404 393
Answer:
330
Explanation:
nCk can be computed from the formula ...
nCk = C(n, k) = n!/(k!(n-k)!)
Here, that is
11C7 = 11!/(7!(11-7)!) = 11·10·9·8/(4·3·2·1) = 11·10·3 = 330
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Additional comment
Many graphing or scientific calculators have probability functions that will compute this for you.