Question

A bag contains eight red marbles and six blue marbles. You randomly pick a marble then RETURN it to the bag before picking a second marble. The first marble is red and the second marble is blue, find the probability

A. 0.111
B. 0.04
C. 0.245

Answer 1

The probability of picking both a red and then a blue marble [while replacing them] is C, 0.245

Explanation:

so, the probability of getting a red marble the first round is 8/14.

The probability of getting a blue marble the second round is 6/14

Multiply them to find the probability of picking both a red and then blue...

8/14 * 6/14 = 12/49 or in decimal: 0.2448...

So the probability of that happening is about 0.245