Question: Use any method described in this section to solve the problem. In an experiment on plant hardiness, a researcher gathers 6 wheat plants, 3 barley

Use any method described in this section to solve the problem.

In an experiment on plant hardiness, a researcher gathers 6 wheat plants, 3 barley plants, and 2 rye plants. She wishes to select 4 plants at random.

(a) In how many ways can this be done?

(b) In how many ways can this be done if exactly 2 wheat plants must be included?

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