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joylive
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somalwar
Can someone please explain how D is the answer?

Perfect solution by MacFauz here: samantha-s-investment-portfolio-consists-of-three-stocks-142973.html#p1147009

Hint: the question asks for which option is the expression (A*1.1+B*0.85+C*0.85)-(A+B+C) positive.
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i know this is not the best way to answer this question ,but if you read the question and understand the first stock should be much higher in value compared to the other two.
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joylive
Samantha's investment portfolio consists of three stocks: an airline, a bank, and a computer company. In the month of February, the price of the airline's stock rose by 10%, that of the bank decreased by 15% and that of the computer company also decreased by 15%, but the overall value of her portfolio increased. If Samantha owns equal amounts of all three stocks, which of the following could be the initial prices of the three stocks in the order airline, bank, and computer company respectively?

A. $55, $85, $40
B. $65, $60, $60
C. $65, $55, $90
D. $85, $25, $20
E. $25, $60, $70
Let initial price be, A(Airline) -> x, B(Bank) -> y, C(Computer) -> z
In Feb, A -> 1.1x, B -> 0.85y, C -> 0.85z

As given in the statement, in February, the portfolio value was higher than the initial value.
So,
(1.1x + 0.85y + 0.85z) - (x + y + z) > 0

Only Option D will satisfy this condition.
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