Question

A marble is picked at random. Without putting the first marble back, a second marble is picked at random. ​Find the probability that first marble picked is green and second marble picked is red. ​Write your result as a percentage.

Answer 1

Probability = 1/5 = 20%

Explanation:

Prob (1st marble green) = Green Marbles / Total Marbles = 3/6 = 1/2

Pr (2nd marble red), without replacement = Red Marbles / Left Total Marbles = 2/5

Prob (1st marble green, & 2nd marble red) = 1/2 x 2/5 = 1/5

Prob in percent = 1/5 x 100 = 20%