Answer and explanation:
There's 3 one dollar bills
2 five dollar bills
and 2 ten dollar bills
and 1 twenty dollar bill
3+2+2+1=8
Part A: The probability of selecting 5 is 2/8 and the probability of selecting 10 is also 2/8 and both of them are the same, 1/4.
Part B: The probability of selecting a one dollar bill is 3/8 and the probability of selecting a twenty dollar bill is 1/8 because there are 3 one dollar bills in 8 bills and 1 twenty one dollar bill in 8 bills only.