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At what rate would a sum of N100.00 deposited for 5 years raise an interest...

Mathematics
JAMB 1990

At what rate would a sum of N100.00 deposited for 5 years raise an interest of N7.50?

  • A. \(\frac{1}{2}\)%
  • B. 2\(\frac{1}{2}\)%
  • C. 1.5%
  • D. 25%
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Correct Answer: Option C
Explanation

Interest I = \(\frac{PRT}{100}\)

∴ R = \(\frac{100 \times 1}{100 \times 5}\)

= \(\frac{100 \times 7.50}{500 \times 5}\)

= \(\frac{750}{500}\)

= \(\frac{3}{2}\)

= 1.5%


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