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kiran120680
Each of the pair of shoes available in a store is of either Reebok or Adidas. Due to off-season 10% of the Reebok and 15% of the Adidas shoes were on sale. What percentage of the store stock was of Adidas shoes, if 12% of the store's stock was on sale?

A. 16.66%
B. 20%
C. 33.33%
D. 40%
E. 50%

R - Reebok; A - Adidas
Assume 100 shoes, 12 is on sale (12% of 100)
10% R + 15% A = 12
R + A = 100

A = 40 shoes
so A is 40%

Answer: D
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hi are there any more examples of these types of weighted average problems please? what is the formula
chetan2u
kiran120680
Each of the pair of shoes available in a store is of either Reebok or Adidas. Due to off-season 10% of the Reebok and 15% of the Adidas shoes were on sale. What percentage of the store stock was of Adidas shoes, if 12% of the store's stock was on sale?

A. 16.66%
B. 20%
C. 33.33%
D. 40%
E. 50%



This is a typical weighted average method...
Quantity of Adidas as a % of total = \(\frac{12-10}{15-10}*100=40\)%

D
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emont
hi are there any more examples of these types of weighted average problems please? what is the formula
chetan2u
kiran120680
Each of the pair of shoes available in a store is of either Reebok or Adidas. Due to off-season 10% of the Reebok and 15% of the Adidas shoes were on sale. What percentage of the store stock was of Adidas shoes, if 12% of the store's stock was on sale?

A. 16.66%
B. 20%
C. 33.33%
D. 40%
E. 50%



This is a typical weighted average method...
Quantity of Adidas as a % of total = \(\frac{12-10}{15-10}*100=40\)%

D

18. Mixture Problems



For more check Ultimate GMAT Quantitative Megathread

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