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# Probability and Marbles: Blue or Green

SATSTM-OMFQJY

A bag of marbles has $3$ blue marbles, $4$ red marbles, and $7$ green marbles.

If one marble is drawn from the bag, then what is the probability that the marble is either blue or green?

A

$\cfrac{5}{7}$

B

$\cfrac{1}{2}$

C

$\cfrac{1}{7}$

D

$\cfrac{1}{10}$

E

$\cfrac{1}{3}$