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JEE MATHEMATICS MCQ: COMBINATIONS

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From a company of 20 soldiers any 5 are placed on guard, each batch to watch 5 hours. The total number of hours watched by different batches selected is

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Correct option: C

{ }^{20} C_5 \times 5

Option C (

{}^{20} C_5 \times 5

) is correct because it represents the total number of hours watched by different batches, where each batch consists of 5 soldiers and watches for 5 hours.

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n