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BITSAT Mathematics Permutation Combination 2020 BITSAT 2020

BITSAT Mathematics Question (2020) — Solution

Question

If 16 identical pencils are distributed among 4 children such that each gets at least 3 pencils. The number of ways of distributing the pencils is

Options

  1. A. 15
  2. B. 25
  3. C. 35
  4. D. 40

Answer

C. 35

Step-by-step solution

Required number of ways = coeff. of x^ 16 in (x^ 3 +x^ 4 +x^ 5 +x^ 6 +x^ 7 )^ 4

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