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# An engineering statistics class has 40 students?

An engineering statistics class has 40 students and 60% are electrical engineering majors, 10% are industrial engineering majors, and 30% are mechanical engineering majors. A sample of 4 students is selected randomly, without replacement, for a project team. Let X and Y denote the number of industrial engineering and mechanical engineering majors, respectively. Determine the following:

a) fxy(x,y)

b) fx(x)

c) E(X)

d) fy|3 (y)

e) E(Y | X=3)

f) V(Y|X=3)

g) Are X and Y independent?

*I mainly just need help with part a because I don't know where to start, but I'm sure once I figure that out, I can figure out the rest. Thanks!

### 1 Answer

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- 8 years agoFavorite Answer
i d k. but u should really ask ur teacher/professor. sorry hopefull u'll find out. GOOD LUCK

Source(s): Myself

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