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9. Combinations
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Q1 of 68 Page 330

71C71


We know that:


nCr =


⇒71C71=


⇒71C71=


⇒71C71= …


⇒71C71=1


Ans: 71C71=1


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Questions · 68
9. Combinations
1 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
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