PSAT Math Multiple-Choice Question 707: Answer and Explanation

Question: 707

A stockbroker sold $1,000 in shares of Company X stock. Approximately how many more shares would she have sold if the stock price is taken at the minimal value in the graph versus at the maximum value in the graph?

• A. 8
• B. 20
• C. 40
• D. 80

Correct Answer: D

Explanation:

(D) The minimal stock price is about $11/share. Since the stockbroker sold $1,000 in shares, she must have sold:

The maximum price is about $88/share:

She would have sold 90.91 - 11.36 = 79.55 more shares at the lower price, or about 80 as in choice (D).