book Maths Puzzle Numerical Ability

Jill has $12000 to invest. She invests 8% /a and the rest at 9% /a. After one year her interest is $1043. How much did she invest at each rate?

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book Other Question

Increase revenue. Even though the number of tickets sold for a concert decreases with increasing price, the revenue generated does not necessarily decrease. Use the formula R= p(48 -10+(+3)= the possibilites are.........7, -13, -7, 13