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A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one–by–one, with replacement, then the variance of the number of green balls drawn is :-
  • a)
    6/25
  • b)
    12/5
  • c)
    6
  • d)
    4
Correct answer is option 'B'. Can you explain this answer?
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A box contains 15 green and 10 yellow balls. If 10 balls are randomly ...
We can apply binomial probability distribution Variance = npq
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A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one–by–one, with replacement, then the variance of the number of green balls drawn is :-a)6/25b)12/5c)6d)4Correct answer is option 'B'. Can you explain this answer?
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