A group of 10 representatives is to be selected out of 12 seniors and 10 junior

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A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior?

Options:

Answer: Option D

The total number of ways of forming the group of ten representatives is ²²Câ‚â‚€. The total number of ways of forming the group that consists of no seniors is ¹â°Câ‚â‚€ = 1 way The required number of ways = ²²Câ‚â‚€ - 1

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