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Manager
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The price of lunch for 15 people was $207 including a 15 [#permalink] ### Show Tags 13 Nov 2006, 14:23 This topic is locked. If you want to discuss this question please re-post it in the respective forum. The price of lunch for 15 people was$207 including a 15 percent gratuity for service. What was the average price per person, excluding the gratuity?

A)$11.73 B)$12.00
C)$13.00 D)$14.00
E)$15.87 My answer: (207) (15 / 100) = 31.05 207 â€“ 31.05 = 179.95 179.95 / 15 = 11.73 But the correct answer is$12.00. Why?
SVP
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13 Nov 2006, 14:32
The price of lunch for 15 people was $207 including a 15 percent gratuity for service. What was the average price per person, excluding the gratuity? A)$11.73 B)$12.00 C)$13.00 D)$14.00 E)$15.87

LET ORIGINAL PRICE BEFORE SERVICE = X

PRICE AFTER SERVICE = 207

= X+.15X = 1.15X = 207

X = 180

AVERAGE = 180/15 = 12

HOPE THIS HELPS
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13 Nov 2006, 15:46
=207/1.15 = 180
=180/15 = 12
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13 Nov 2006, 15:46
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