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Bala sold an article for #6,900.00 and made a profit of 15%. Calculate his percentage profit...

Mathematics
WAEC 2019

Bala sold an article for #6,900.00 and made a profit of 15%. Calculate his percentage profit if he had sold it for N6,600.00. 

  • A. 5%
  • B. 10%
  • C. 12%
  • D. 13%
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Correct Answer: Option B
Explanation

15 = (\(\frac{6,900 - C.P \times 100}{C.P}\))

15 C.P = 690000 - C.P 100

C.P = \(\frac{690000}{115}\)

C.P = N6,000

%profit = \(\frac{6,600 - 6,000}{6,000}\) x 100

= \(\frac{600}{6,000}\) x 100 

= 10%


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