8 notebooks cost 10 dollars. At the same price, how much do 6 notebooks cost?

Answer and explanation

Correct answer: D. 7.5 dollars

  1. Step 1: One notebook costs 10 / 8 = 1.25 dollars. Step 2. 6 notebooks cost 1.25 x 6 = 7.5 dollars. Answer: 7.5 dollars. Why not the others: 60 dollars: this multiplies the price of 8 notebooks by 6. 1.25 dollars: this is the price of one notebook. 8 dollars: this adds and subtracts instead of using the unit price.

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