I'm not good at math but I think is 3f because you'll be multiplying f(unknown #) by 3 so f(x) would be 3f
Ummm i don't know what the pmf would be but the probability of grabbing a blue sock would be 10 out of 100...
21*x=9*21
9*21=189
21*x=189
Divide 189 by 21 to solve for X or in this case "Blank"
189/21= 9
730/27 or improper fractions 27 1/27
D) Jenny is writing a check to cover her monthly car payment.
