A photographer purchases 30 rolls of black and white film and 25 rolls

Question

A photographer purchases 30 rolls of black and white film and 25 rolls of color film. If the cost of each roll of color film is twice of the cost of each roll of black and white film, what percent of the total cost of the film is the price of a roll of color film?

A) 0.5%
B) 1.0%
C) 2.0%
D) 2.5%
E) 3.0%

A) 0.5%
B) 1.0%
C) 2.0%
D) 2.5%
E) 3.0%

ArunSharma12 · Answer

let the cost of a roll of black and white film be x.
cost of a roll of color film is 2x.

required percent =  \frac{2x*100}{(30*x + 25*2x)}  =  \frac{2x*100}{80x}  = 2.5%
Ans: D

GMATinsight · Answer

B = 30, Cost of each B = x
C = 25, Cost of each C = 2x

Total COst = 30x + 25*2x = 80x

Cost of color / Total Cost = 2x / 80x = 1/40 = 2.5%

Answer: Option D

ayushkumar22941 · Answer

let the cost of black and white film be x and that of color film is 2x. cost of 30 black film will be 30x and 25 color film will be 50 x .total cost of film will be then 80x .
so required percentage will be (2x/80x)*100=2.5% 
so option d

MrSengupta · Answer

The answer is (D)

We know Colour=2(Black)

Therefore total cost = 30B+(2*25)B=80B

The price of a colour film is 2B . Therefore 2B/80B*100 % =2.5%

adstudy · Answer

Let price of one B&W film be $1
Hence price of color film = $2 (Given, cost of each roll of color film is twice of the cost of each roll of black and white film)

30 rolls of black and white film = $30
25 rolls of color film = $ 50
Total = $80

percent  of the total cost of the film is the price of a roll of color film =

\frac{price-of-a-roll-of-color-film}{total-cost-of-the-film} * 100

\frac{$2}{$80} * 100

=2.5%

Hence D

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A photographer purchases 30 rolls of black and white film and 25 rolls

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A photographer purchases 30 rolls of black and white film and 25 rolls

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