In a smoking survey among boys between the ages of 12 and 17, 78% prefer to date nonsmokers, 1% prefer to date smokers, and 21%

Question

3 years ago

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In a smoking survey among boys between the ages of 12 and 17, 78% prefer to date nonsmokers, 1% prefer to date smokers, and 21%

don’t care. Suppose seven such boys are selected randomly. Let X equal the number who prefer to date nonsmokers and Y equal the number who prefer to date smokers. (a) Determine the joint pmf of X and Y. Be sure to include the support of the pmf. (b) Find the marginal pmf of X. Again include the support.

Mathematics

1 answer:

Ganezh [65] · Answer 1 · 2022-03-07T09:24:06+03:00

Ganezh [65]3 years ago

4 0

Answer:

i think it is a

Step-by-step explanation: