Latest TCS Aptitude Question SOLUTION: A boy buys 18 sharpeners (brown or white) for Rs.100. For every white sharpener, he pays one rupee more than the brown sharpener. What is the cost of white sharpener and how much d

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A boy buys 18 sharpeners (brown or white) for Rs.100. For every white sharpener, he pays one rupee more than the brown sharpener. What is the cost of white sharpener and how much did he buy?

Asked In TCS anuja hore (5 years ago)

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Shiva Prasad Bandarupally  (5 years ago)

the cost of white sharpener is 6/-
and he bought 10 white and 8 brown

Is this solution Helpfull? Yes (3) | No (7)  

Devendra Kumar Tripathi  (5 years ago)

Assume that he bought b, brown sharpeners and w, white sharpeners and the cost of brown sharpener is x and white sharpener is x + 1
So w(x+1) + bx = 100
w + b = 18
b = 18 - w
Substituting in equation 1, we get w(x+1) + (18 -w)x = 100 so w + 18 x = 100
Take option 1: If white sharpners are 13, x = (100 - 13) /18 = 4.833
Option 2, If white sharpeners are 10, x = (100 - 10)/18 = 5 So white sharpeners cost is 6.
Option 3 Satisfies this condition
options are
a) 5, 13 b) 5, 10 c) 6, 10 d) None of these

Is this solution Helpfull? Yes (1) | No   

Anmol Sharma  (5 years ago)

cost of white sharpener is 9rs and he bought 2 white sharpeners

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