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प्रश्न
There will be only 24 selections containing at least one red ball out of a bag containing 4 red and 5 black balls. It is being given that the balls of the same colour are identical.
विकल्प
True
False
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उत्तर
This statement is True.
Explanation:
We have 4 red and 5 black balls in a box and atleast one red ball is to be drawn
∴ Number of selection = [(4 + 1)(5 + 1) – 1] – 5
= [5 × 6 – 1] – 5
= 29 – 5
= 24
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