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MHT CET20227 Aug 2022Evening ShiftMathematicsProbabilityActual

A bag contains 5 red marbles, 4 black marbles and 3 white marbles. Then the number of ways in which 4 marbles can be drawn so that at most 2 of them are red is

Options

  1. A385
  2. B406
  3. C210
  4. D420

Correct answer

D. 420

Step-by-step solution

The required number of ways aligned & = ^7 C ₄+ ^5 C ₁ ^7 C ₃+ ^5 C ₂ ^7 C ₂ & =35+5 35+10 21 & =35+175+210 & =420 aligned

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