Q:

# At an office supply store, packs of pencils are sold for $1.50 each, and packs of pens are sold for$4 each. If at the end of the day, the store sold 28 packs of writing utensils and made $67, how many packs of pens and pencils did it sell? Accepted Solution A: -------------------------------------------------------------------------------------------- Information Given -------------------------------------------------------------------------------------------- Pack of pencils =$1.50
Pack of pens = $4 Quality sold = 28 Amount made =$67

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Assumed all are the 28 pack are pencils
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28 x $1.50 =$42

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Find difference in amount between assumption and actual
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$67 -$42 = $25 -------------------------------------------------------------------------------------------- Find the difference in price between the two items --------------------------------------------------------------------------------------------$4 - $1.50 =$2.50

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Find the number of actual packs of pens bought
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$25 Γ·$2.50 = 10

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Find the number of actual packs of pencils bought
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28 - 10 = 18

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Ans: 18 packs of pencils and 10 packs of pens
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Checks:
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Pens : 10 x $4 =$40
Pencils 18 x $1.50 =$27
Total = $40 +$27 = \$67Β  β Correct