Question

A bag contains 60 marbles, some blue and some green. The ratio of blue marbles to green

ones is 1: 5. How many blue marbles are there?

Answer 1

`(1)/(1+5)\cdot 60=(1)/(6)\cdot 60=10`
There are 10 blue marbles (and 50 green ones).

Answer 2

there are 10 blue marbles in the bag

Explanation:

A bag contains 60 marbles, some blue and some green. The ratio of blue marbles to green ones is 1: 5.

Total of 60 marbles

The ration of blue to green is 1:5

1+5 = 6

Total of 6 marbles , 1 is blue

now we make a proportion. Let x be the number of blue marbles in the bag

`(1)/(6) = (x)/(60)`

Cross multiply it

`60= 6x`

Divide both sides by 6

x=10

So there are 10 blue marbles in the bag