The cd recyclery sells used cds for $10 each and buys them for $6 each. bob paid $20 when he bought and sold the same number of cds. how many cds did he buy?

2

Step-by-step explanation:

you can figure that out by knowing the recyclery sells them for 10 and he a $20 tat means he got two of them

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

75

step-by-step explanation: