# A Fraction Question

• Nov 1st 2008, 09:27 AM
FB FTW
A Fraction Question
Hey,

A bag contains counters that are RED, BLACK, or GREEN.

"1 OVER 3" are red
"1 OVER 6" are black

There are 15 green counters in the bag. How many black counters are in the bag?

I multiplied the "1 OVER 3" by 2 to get
"2 OVER 6"

So then its the same as the black ones, so green must be:
"3 OVER 6"

And so..Im not sure how what to do from here...

Thanks
• Nov 1st 2008, 09:38 AM
Moo
Hello,

Quote:

A bag contains counters that are RED, BLACK, or GREEN.

"1 OVER 3" are red
"1 OVER 6" are black

There are 15 green counters in the bag. How many black counters are in the bag?

I multiplied the "1 OVER 3" by 2 to get
"2 OVER 6"

So then its the same as the black ones, so green must be:
"3 OVER 6"
Correct until this point :)

You know that 3/6 of the counters are green, that is 3/6 of the counters make 15 counters.

So 1/6 of the counters, which are black, will make (15/3)=5 counters, since 1/6 is one third of 3/6.
• Nov 1st 2008, 10:59 AM
FB FTW
Thank you yet again Moo.

+Thank.

• Nov 1st 2008, 11:59 PM
CaptainBlack
Quote:

Originally Posted by FB FTW
Thank you yet again Moo.

+Thank.