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Carol, Rachel and Mercy had a total of 495 coins.
The ratio of the number of coins belonging to Carol to the combined number of coins belonging to Rachel and Mercy was 7 : 8.
The ratio of the number of coins belonging to Rachel to the combined number of coins belonging to Carol and Mercy was 4 : 5.
(a) How many coins did Rachel and Mercy have altogether?
(b) Find the ratio of the number of coins of Carol to Mercy to Rachel.
Notes to students:
- If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12
2. If your answer is a ratio, leave it as a:b