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Jack buys 18 sharpeners (white and brown) for rs. 100.If he pays 1 rupee more for each white than brown sharpeners.how many of white and how many brown sharpeners did he buy?
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- it is simple funda of guessing.. and if the option given it is so easy..
lets think x brown ones are there so the no of whites are 18-x.
now each brown coast y and each white then coast y+1.
so xy+(18-x)*(y+1)=100
18y-x=82
so one can easily say that y=5 and x=8
we cant take more for sum expectation.
now if brows are x and cost y then the total coast is xy=40 and
the whites are 10 and they coast 1 rs more each so they coast 6 and 6*10 is 60 and
60+40 is 100 so the sum satiesfies - 10 years agoHelpfull: Yes(10) No(1)
- Ans is 10 white and 8 brown
tot cost=100
no of sharp.=18
cost of white=cost of brown+1
100/18=5.5...-(1)
also 100%18=10...-(2)
as cost of white is 1 more than that of brown
from 1 int. value will be 5
now remainder is 10 so 10 sharp. will be of cost (5+1)
=> 10*(5+1)+8*5
=>10*6+8*5
=60+40
100
white=10
brown=8 - 10 years agoHelpfull: Yes(5) No(0)
- let white sharpners cost=5
if he buys 8, then 8*5=40
if he buys 10 brown sharpners with price 1 rupee more than white sharpners
then 10*6=60
so total 10+8=18 sharpners
and 40+60=100 rupees....
- 10 years agoHelpfull: Yes(3) No(0)
- anupam can u explain how 5 and 8 ???
- 10 years agoHelpfull: Yes(2) No(0)
- let white = x
cost of brown=a
x(a+1) + a(18-x) = 100
x+18a=100
put x=10 from option a=5
- 10 years agoHelpfull: Yes(1) No(0)
- @rajnandini the equation is 18y-x=82.. so 18*5 is 90 and 90-8=82 simple.. thats why 5 and 8 okk?
- 10 years agoHelpfull: Yes(1) No(0)
- thnks anupam :)
- 10 years agoHelpfull: Yes(0) No(0)
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