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BITSAT2020MathematicsPermutation and CombinationActual

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. A15
  2. B25
  3. C35
  4. D40

Correct answer

C. 35

Step-by-step solution

Required number of ways = coeff. of x¹⁶ in (x³+x⁴+x⁵+x⁶+x⁷ )⁴

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