Question

The ratio of red marbles to blue marbles in a jar is 3 to 8. There are 40 blue marbles in the jar.

How many red marbles are in the jar?

A.
5

B.
15

C.
24

D.
35

Answer 1

@4jesus

Answer 2

@ccswims

Answer 3

@Nnesha

Answer 4

@Michele_Laino

Answer 5

Do I multiply 3x8=24... Then 40-24

Answer 6

Nvm that'll equal 16!

Answer 7

Good job!

Answer 8

First find out how many lots of 8 blue marbles are in the 40 blue marbles by dividing 40 by 8.
Then multiply 3 by the result:
\[\large Number\ of \ red\ marbles=\frac{40}{8}\times3=you\ can\ calculate\]

Answer 9

please note that you have to use this formula:
\[\frac{ r }{ b }=\frac{ 3 }{ 8 }\]
where r is the number of red Marbles, and b is the number of blue Marbles, furthermore, we know that:
\[r+b=40\]

Answer 10

B

Answer 11

40/8=5. Then 5*3=15 :)

Answer 12

oops.. furthermor we have b= 40

Answer 13

Thanks guys

Answer 14

You're welcome :)

Answer 15

@Michele_Laino People makes mistakes. I'm happy you helped though. :)

Answer 16

thanks! I was too hurry!