Question
PSLE
Mr Yong bought some catfishes at $10 each. He also bought an equal number of swordtails at a different price. The average price of a catfish and a swordtail was $7. Mr Yong paid $66 less for the swordtails than the catfishes. How many catfishes did he buy?
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PSLE
Mr Yong bought some catfishes at $10 each. He also bought an equal number of swordtails at a different price. The average price of a catfish and a swordtail was $7. Mr Yong paid $66 less for the swordtails than the catfishes. How many catfishes did he buy?