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From 6 boys and 4 girls 5 are to be seated. If there must be exactly 2 girls the number of ways of selection is __________.
- a)240
- b)120
- c)60
- d)None
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
From 6 boys and 4 girls 5 are to be seated. If there must be exactly 2...
Given: 6 boys and 4 girls, 5 are to be seated. Exactly 2 girls need to be seated.
To find: The number of ways of selection.
Solution:
We need to select 2 girls out of 4 and 3 boys out of 6.
Number of ways of selecting 2 girls out of 4 = 4C2 = 6
Number of ways of selecting 3 boys out of 6 = 6C3 = 20
Total number of ways of selecting 2 girls and 3 boys = 6 × 20 = 120
Therefore, the number of ways of selection is 120.
Hence, option (B) is the correct answer.
To find: The number of ways of selection.
Solution:
We need to select 2 girls out of 4 and 3 boys out of 6.
Number of ways of selecting 2 girls out of 4 = 4C2 = 6
Number of ways of selecting 3 boys out of 6 = 6C3 = 20
Total number of ways of selecting 2 girls and 3 boys = 6 × 20 = 120
Therefore, the number of ways of selection is 120.
Hence, option (B) is the correct answer.
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From 6 boys and 4 girls 5 are to be seated. If there must be exactly 2 girls the number of ways of selection is __________.a)240b)120c)60d)NoneCorrect answer is option 'B'. Can you explain this answer?
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