Cost Comparison of Tools
Item Cost at John's Tools Cost at Lin's Tools
Hammer 15$ 18$
Drill 50$ 55$
Electric saw 30$ 25$
If a distributor receives a $10$ % discount from Johns Tools and a $15$ % discount from Lins Tools, how much more would they pay, in dollars, to buy a drill and electric saw from Johns Tools than Lins Tools?

$ 4

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$ 5

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$ 2

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$ 7

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Solution

The correct option is A $$ 4$
John's tool $10 %$ discount $=$ $\frac{50 + 30}{100} \times 10 = 8$
Lin's tool $15 %$ discount $=$ $\frac{55 + 25}{100} \times 15 = 12$
The cost to buy a drill and electric saw from Johns tools than Lins tools $= 12 - 8 = $ 4$

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