New Free Workshop on RBI Grade B Descriptive Answer Writing - Join Us!
Register

Question

In a Group of 8 boys and 6 girls, Six children are to be selected. In how many different ways can they be selected such that at least one boy should be there?

A 4220 Correct Answer Incorrect Answer
B 2560 Correct Answer Incorrect Answer
C 7806 Correct Answer Incorrect Answer
D 3002 Correct Answer Incorrect Answer
E 5026 Correct Answer Incorrect Answer

Solution

For At least 1 boy we have (1 boy and 5 girls), (2 boys and 4 girls), (3 boys and 3 girls), (4 boys and 2 girls), (5 boys and 1 girl), (6 boys) ∴ Required Number of ways = (8C1× 6C5) + (8C2 × 6C4) + (8C3 × 6C3) + (8C4 × 6C2) + (8C5 × 6C1) + 8C6 = 48 + 420 + 1120 + 1050 + 336 + 28 = 3002 ways

Practice Next

Relevant for Exams:

×
×