A bag contains: 4 blue marbles

2 green marbles

1 red marble

A marble is chosen at random from the bag and not replaced. Then, a second marble is chosen from the bag. What is the probability that the first marble was red and the second marble was green?

A) 1/7

B) 1/21

C) 2/49

D) 2/6

it is ether B or D cuz

Step-by-step explanation:

4+2+1=7  marbles

(4/1)+(2/1)+(1/1)=7/21

divide 21 by 7 that would = 3

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

step-by-step explanation:

compare