rs 9800 are invested partly in 9 stock at 75 and 10..., Rances & Games of Skill, General Mathematics

Question:Rs.9800 are invested partly in 9% stock at 75 and 10% stock at 80 to have equal amount of incomes. The investment in 9% stock is :

A Rs. 4800 
B Rs. 5000 
C Rs. 5400 
D Rs. 5600

/59

+ AnswerB

+ ExplanationLet the investment in 9% stock be Rs. x.

Then, investment in 10% stock = Rs. (9800 - x)

`9/75 xx x = 10/80 xx (9800 - x) or (3x)/25`

`= (9800 - x)/8`

`or 24x = 9800 xx 25 - 25x or 49x`

`= 9800 xx 25 or x = 5000.`

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