) A lends 30% of sum at 30% p.a. 50% of sum at 14% p.a. and the remaining sum at 12% p.a. rate of interest. What would be the rate of interest, if the interest is calculated on the whole sum?
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Answer:
56% p.a.
Step-by-step explanation:
30% =30%
50% =14%
20% =12%
100% =56%
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