exam Maths Puzzle Numerical Ability

2.4x - 1.2x = 4.8

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exam Other Question

A metallurgist has one alloy containing 20% copper and another containing 70% copper. How many pounds of alloy must he use to make 50 pounds of the a third alloy containing 50% copper?

Thank you for taking the time to help! Carol has more than 80 coins, all nickels and dimes. She has dimes than nickels. What is the least number that Carol can have.