Question

In a bag of marbles there are 7 blue, 3 red, 14 yellow, 1 white, and 10 black.

What is the ratio of blue and yellow marbles to white and black marbles?

a
7 to 11
b
14 to 10
c
21 to 11
d
11 to 21
e
20 to 10

Answer 1

c) 21 to 11

Explanation:

Finding the ratio :

⇒ Number of blue + Number of yellow : Number of white + Number of black

⇒ 7 + 14 : 1 + 10

⇒ 21 : 11

⇒ 21 to 11

Answer 2

before we write the ratio, we have to figure out how many marbles we have in each pair. we can do this by simply adding.
blue + yellow = 7 blue + 14 yellow = 21 marbles
white + black = 1 white + 10 black = 11 marbles
now, set up the ratio:
blue + yellow : white + black
21 : 11 (also written as 21 to 11)
so the answer would be c
hope this helps!