The price for lunch for 15 people is $207, including 15% gratuity for service. What was the average price per person, EXCLUDING the gratuity?
a. $11.73
b. $12
c. $13.80
d. $14
e. $15.87
This is how I am solving this question
Finding 15% of 207
15/100 x 207 = $31.05
207 - 31.05 = $175.95 <= price for 15 people without gratuity
price per person = 175.95/15 = 11.73 (this is option A)
but the OG says that correct answer is $12, if there were no option for $11.73 then i can understand that its $12 by rounding it off.
the method that the OG uses brings the result to be $12, but my method is not wrong too, the result should be the same no matter what method you apply
someone help please
Help needed with OG question 135
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Yes, 12 is correct answer.sanaa.rizwan wrote:The price for lunch for 15 people is $207, including 15% gratuity for service. What was the average price per person, EXCLUDING the gratuity?
a. $11.73
b. $12
c. $13.80
d. $14
e. $15.87
This is how I am solving this question
Finding 15% of 207
15/100 x 207 = $31.05
207 - 31.05 = $175.95 <= price for 15 people without gratuity
price per person = 175.95/15 = 11.73 (this is option A)
but the OG says that correct answer is $12, if there were no option for $11.73 then i can understand that its $12 by rounding it off.
the method that the OG uses brings the result to be $12, but my method is not wrong too, the result should be the same no matter what method you apply
someone help please
There are 15 people and let's suppose it cost $x for each.
It costed them 207 including Tips
=> X * 15 + 15/100 (x * 15) = 207
=> x * 15( 1+3/20) = 207
=> x = 12
Since we are excluding Tips it is just 12 $ per person.
Thanks,
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FLUID wrote:Yes, 12 is correct answer.sanaa.rizwan wrote:The price for lunch for 15 people is $207, including 15% gratuity for service. What was the average price per person, EXCLUDING the gratuity?
a. $11.73
b. $12
c. $13.80
d. $14
e. $15.87
This is how I am solving this question
Finding 15% of 207
15/100 x 207 = $31.05
207 - 31.05 = $175.95 <= price for 15 people without gratuity
price per person = 175.95/15 = 11.73 (this is option A)
but the OG says that correct answer is $12, if there were no option for $11.73 then i can understand that its $12 by rounding it off.
the method that the OG uses brings the result to be $12, but my method is not wrong too, the result should be the same no matter what method you apply
someone help please
There are 15 people and let's suppose it cost $x for each.
It costed them 207 including Tips
=> X * 15 + 15/100 (x * 15) = 207
=> x * 15( 1+3/20) = 207
=> x = 12
Since we are excluding Tips it is just 12 $ per person.
Yes. 12 is the correct answer. Sanaa, in your approach you are reducing 15% of the total bill i.e. $207
where as according to the question the 15% gratuity is on the per head cost and not on the total bill.
hence the correct approach is as shown by FLUID.
Hope this helps.
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We can plug in the answers, which represent the cost per person.The price of lunch for 15 people was $207.00,
including a 15 percent gratuity for service. What was
the average price per person, EXCLUDING the
gratuity?
(A) $11.73
(B) $12.00
(C) $13.80
(D) $14.00
(E) $15.87
Given that the total cost is an INTEGER, the correct answer is almost certainly an integer itself.
Answer choice D is too great, since 15 people paying $14 each = 15*14 = 210 -- a value beyond the total cost of 207.
Answer choice B: $12 per person without gratuity
Total price for 15 people = 15*12 = 180.
Price + gratuity = 180 + .15(180) = 180+27 = 207.
Success!
The correct answer is B.
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=
In the problem above, let P = the final price with gratuity and C = the total cost for 15 people without gratuity.
Since the final price is 15% greater than the cost without gratuity, we get:
P = (115/100)C
P = (23/20)C
C = (20/23)P.
Thus, the cost without gratuity is equal to 20/23 -- not 85% -- of the final price with gratuity.
Since P = 207, we get:
C = (20/23)(207) = 180.
Since there are 15 people, the cost per person without gratuity = 180/15 = 12.
X is 15% greater than Y does NOT imply that Y is 15% less than X or that Y is 85% of X.shurale wrote:I have the same question and I don't really get it, why can't we just 207*0,85 instead of 207/1,15 when we are looking for 15%? Shouldn't it be the same?
In the problem above, let P = the final price with gratuity and C = the total cost for 15 people without gratuity.
Since the final price is 15% greater than the cost without gratuity, we get:
P = (115/100)C
P = (23/20)C
C = (20/23)P.
Thus, the cost without gratuity is equal to 20/23 -- not 85% -- of the final price with gratuity.
Since P = 207, we get:
C = (20/23)(207) = 180.
Since there are 15 people, the cost per person without gratuity = 180/15 = 12.
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dears
try to understand the approach for such question
putting 15% for 207 is wrong it's 15% of X + X = 207
so calculate in such manner that 207/1.15 = actual value
now divide actual value by 15
= 12
try to understand the approach for such question
putting 15% for 207 is wrong it's 15% of X + X = 207
so calculate in such manner that 207/1.15 = actual value
now divide actual value by 15
= 12