the ratio of red marbles to blue marbles is 3:4. which of the following I a possible total number of marble??

a. 21
b. 32
c. 30
d. 40

Respuesta :

That answer is a Hope this helps
I believe it is A- 21.

3:4 = 10 : 11
10 + 11 = 21

HOPE THIS HELPED
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