book Maths Puzzle Numerical Ability

2 to the second
power d3 zs

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book Other Question

If 300 of 500 voters surveyed said that they would vote for the incumbent, then how many votes could the incumbent expect out of 843,000 votes? Write this phrase in algebraic terms: Seven times the sum of a number and a second
number is the product of five and the second number.
A) 7x + y = 5y B) 7(x + y) = 5 + y C) 7x + y = 5 + y D) 7(x + y) = 5y