Question

The ratio of red marbles to blue

marbles in a bag is 2:7. What is the possible total number of marbles

Answer 1

one possible answer is 9

Explanation:

Lets label the total marbles x

then 2:7 can also be written as
`(2)/(7)`

But the total parts is 2 +7 is 9, making 2/9 of the marbles blue and 7/9 of the marbles red

So therefore, the total answer has to be a multiple of 9, because we can not have a fraction of a marble.

9 is a multiple of 9 , so it is a possible result