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OG - 2nd Edition - Question 50

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OG - 2nd Edition - Question 50

by shanice » Thu Jul 19, 2012 10:25 pm
If the total price of n equally priced shares of a certain stock was $12000, what was the the price per share of the stock?

(1)If the price per share of the stock had been $1 more, the total price of the n shares would have
been $300 more.

(2)If the price per share of the stock had been $2 less, the total price of the n shares would have
been alone 5 percent less.

Answer is D = Each statement alone is sufficient.


This question is difficult for me. Please help.
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Source: — Data Sufficiency |
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by niketdoshi123 » Thu Jul 19, 2012 11:34 pm
Remember the two data sufficiency statements never contradict each other. So if they are sufficient, they will lead you to a same unique solution.
Total price of n shares of a stock= $12,000
total shares = n
price of 1 share of the stock = $12,000/n

rephrasing the question: what is the value of n?

statement 1: SUFFICIENT
new total price = $12,300
new price per stock = 12,300/n = (12000/n)+1
=>12300/n - 12000/n = 1
=> n=300

Think this in a different way

If price of each share of a stock is increased by $1, then how many shares should I have so that the total amount increased would be $300? Ans is 300 shares.

statement 2: SUFFICIENT

If I have 300 shares(the unique answer that we got from statement 1) and the price of each share of a stock is decreased by $2, then by what amount the total price would of the shares would be decreased? Ans is $600.
Check whether 5% of 12000 is $600. Ans yes.
Hence both the statements are sufficient.
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by shanice » Fri Jul 20, 2012 8:25 pm
Thank you very much for the great explanation, niketdoshi123. I get it now.
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