A portion of Rs 6600 is invested at a 5 annual return while the remainder is invested at a 3 annual ...........

Quantitative Aptitude ( CCS) Simple Interest

A portion of Rs.6600 is invested at a 5% annual return, while the remainder is invested at a 3% annual return. If the annual income from the portion earning a 5% return is twice that of the other portion, what is the total income from the two investments after one year?

200

270

250

280

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Explanation:

5x + 3y = z (total)
x + y = 6600
5x= 2(3y) [ condition given] 5x – 6y = 0
x + y = 6600
5x -6y = 0
Subtract both equations and you get x = 3600 so y = 3000
3600*.05 = 180
3000*.03 = 90
z (total) = 270