A movie theater regularly sells adult tickets for $12 and child tickets for $6. On a certain day, the theater discounts these regular ticket prices at different rates so that a group of 3 adults and 8 children spends a total of $6 less than what it would regularly spend. If the sum of the two discount rates is 15%, what is the discount rate on each adult movie ticket?
(A) 12%
(B) 10% correct
(C) 8% your answer
(D) 5%
(E) 2%
please explain
percent
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- bubbliiiiiiii
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let discount on adult ticket be a and child ticket be b.
we know a+b =15 ..... I
From question,
3[12-(a/100)(12)] + 8[6-(c/100)(6)] = 78 .... II {78 = (3*12 + 8*6)-6}
By Solving I and II, we get a =10 and c=5.
we know a+b =15 ..... I
From question,
3[12-(a/100)(12)] + 8[6-(c/100)(6)] = 78 .... II {78 = (3*12 + 8*6)-6}
By Solving I and II, we get a =10 and c=5.
Regards,
Pranay
Pranay
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The total cost for 3Adult tickets and 8 Child tickets is $84.
Discount given 15% which brings discount $6 =x%(36)+ (15-x)%48
So cost of total tickets is $78.
Plug in values for x
First option C - 8%
8%(36)+7%(48)
=2.88 + 3.24 -------which is more than 6.
Now to check B or D is the point.
The more % of discount u give to child tickets u get more discount. Here i have given 7 and got total discount more than $6.
So the discount i give to child tickets shd be less. Gmat arranges options in ascending or descending fashion.
So now check option B
10%(36)+5%(48)
=3.6 +2.4 =$6
Therefore B is the right answer.
Discount given 15% which brings discount $6 =x%(36)+ (15-x)%48
So cost of total tickets is $78.
Plug in values for x
First option C - 8%
8%(36)+7%(48)
=2.88 + 3.24 -------which is more than 6.
Now to check B or D is the point.
The more % of discount u give to child tickets u get more discount. Here i have given 7 and got total discount more than $6.
So the discount i give to child tickets shd be less. Gmat arranges options in ascending or descending fashion.
So now check option B
10%(36)+5%(48)
=3.6 +2.4 =$6
Therefore B is the right answer.
- gmatboost
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Why not just solve this equation once you have it?$6 =x%(36)+ (15-x)%48
$6 =x%(36)+ (15-x)%48
6 = .36x + 15*.48 -.48x
Shortcut: 10*0.48 is 4.8, so 15*0.48 is 4.8 + 2.4 = 7.2
6 = 7.2 -.12x
-1.2 = -.12x
1.2 = .12x
120 = 12x
x = 10
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