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The number of distinct terms in the expansion of (x + y – z)16 is (a) 136(b) 153(c) 16(d) 17 |
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Answer» Correct option (b) 153 Explanation: Apply n+r–1Cr–1 to get number of terms 16 + 3 – 1C3 – 1 = 18C2 = 153 |
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