7
In a bag there are counters.
The counters are all either red or blue or yellow.
2
The number of
The number of
:
:
red counters
blue counters
The number of
yellow counters
= 4:5:8
4
S
8
The number of yellow counters is 24 more than the numbers of blue counters.
Work out the total number of counters in the bag.