There are 50 marbles in a jar. Twenty of the marbles are red and the rest are blue. Suppose that you randomly select 4 marbles. What is the probability that all 4 marbles selected are red?
0.211
0.08
0.125
0.021
0.015

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60