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A person lends 40% of his sum of money a...

A person lends `40%` of his sum of money at `15%` per annum, `50%` of rest at `10%` per annum and the rest at `18%` per annum rte of interest. What would be the annual arte of interest, if the interest is calculated on the whole sum ?

A

`13.4%`

B

`14.33%`

C

`14.4%`

D

`13.33%`

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The correct Answer is:
C
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