Given a group of students: 
or 
count the different ways of choosing the following officers or representatives for student congress. Assume that no one can hold more than one office.A president, a secretary, and a treasurer, if the president must be a woman and the other two must be men
A. 3
B. 4
C. 12
D. 6
Answer: C
Mathematics
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Find the vector projv u.v = 3j, u = 4i + 3k
A. 0
B. 
i + 
j + 
k
C. 
j
D. 
i + 
j
Mathematics
Solve the problem. Use an annual percentage rate table if necessary.Enrique has a 60-month fixed installment loan, with a monthly payment of $66.74. The amount he borrowed was $3000. Instead of making his 24th payment, Enrique is paying the remaining balance on the loan. How much interest will Enrique save (use the actuarial method)?
A. $470.16 B. $382.29 C. $388.76 D. $393.21
Mathematics
Find the actual difference.0.54 - (-0.21)
A. 0.85 B. 0.75 C. 0.33 D. 0.1134
Mathematics
Find the mean and standard deviation of the specified probability density function.f(x) = e-x for [0, ?)
A. ? = 1, ? = 1 B. ? = 0.5, ? = 1 C. ? = 0.5, ? = 0.5 D. ? = 10, ? = 10
Mathematics