• Numerical Ability - Permutation & Combination Or Probability
Question

In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected is:

  • A) 21/46
  • B) 21/135
  • C) 42/135
  • D) Can’t be determined
  • E) None of these
Solution

Ans.A

Probability = 10c1*15c2/25c3
   = 21/46

Ans.A

Probability = 10c1*15c2/25c3
   = 21/46
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