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Mr. Nelson used 3/8 of his money to buy some pens and 2/5 of the remainder to buy 2 notebooks. A notebook costs 3 times as much as a pen. How many pens did he buy?​

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HollyVN

Answer: 9

Step-by-step explanation:

Call the Total Amount of money he had X.

Amount he used to buy pens: 3/8X

Amount of money left after buying pens: X - 3/8X = 5/8X

Amount he used to buy notebooks: 2/5 * 5/8X = 1/4X

1/4X or 2/8X for 2 notebooks, so if he spent 3/8X for notebooks, he would get 3 notebooks.

As a notebook cost 3 times a pens, so for 3/8X money, he bought 9 pens.

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