Arun invests in bonds worth Rs. 40000 and he receives a 15% interest per annum. How much money should he invest in bonds that give 10% per annum so that he gains overall 12% per annum?
Options:
A .  50000
B .  65000
C .  60000
D .  62500
Answer: Option C : C Using alligation He should invest in the ratio 2:3 He should invest 60000
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