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99 Percentile Qs Bank for JEE MainMathematicsPermutation and Combination

A linguistic club of a certain Institute consists of 6 girls and 4 boys. A team of 4 members to be selected from this group including the selection of a Captain (from among these 4 members) for the team. If the team has to include atmost one boy, the number of ways of selecting the team is

Options

  1. A95
  2. B260
  3. C320
  4. D380

Correct answer

D. 380

Step-by-step solution

Case I: No boy is included. Selecting 4 girls from 6 girls = ^6 C ₄ Selecting 1 captain from selected members = ^4 C₁ Total number of ways = ^6 C ₄ ^4 C ₁=60 Case II: One boy is included. Selecting 3 girls and 1 boy from given members = ^6 C ₃ ^4 C ₁ . Selecting 1 captain from the selected members = ^4 C ₁ . Total Number of ways = ^6 C ₃ ^4 C ₁ ^4 C ₁=320 . Total Number of ways =320+60=380 .

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