exam Maths Puzzle Numerical Ability

How many gallons of 12%solution must be mixed with a 37%solution to obtain 100 gallons of 22% solution?

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exam Other Question

jeremy has a job at the movie theater. his hourly wage is $7.38 suppose 15% of his income is with hield for taxes and social security.

A. what percent does jeremy get to keep? 21. A student at the university of New Orleans makes money by buying and selling used cars. Charles bought a used car and later sold it for a 20% profit. If he sold it for $4680, how much did Charles pay for the car?