What was the range of the selling prices of the 30 wallets sold by a certain store yesterday
1 Explanation
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1
John Robertson
Range = (Greatest Value in Set) - (Smallest Value in Set)
Range = (Highest wallet price) - (Smallest wallet price)
1) 1/3 of the wallets, 10 of them, sold for $24. You don't know if $24 is highest, lowest, what. NS, A & D cross off
2) Lowest Price = 1/3 Greatest Price, but no way to solve for L or G. NS, B cross off
1& 2) You have: Lowest = 1/3 Greatest, L = 1/3G, and 1/3 of the wallets sold for $24. You have no idea if 24 was the lowest or highest, no way to solve for equation two, both insufficient together.
Ans: E
Nice work John! You're correct that even when we combine the two statements, we're unable to determine the highest or lowest price of the wallets, which leads us to a correct answer of (E).
1 Explanation