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Smita04
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Babar spends equal amount in buying two types of oranges at the rate 04 Jun 2012, 05:28
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55% (hard)

Question Stats:

64% (02:10) correct 36% (02:13) wrong based on 120 sessions

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Babar spends equal amount in buying two types of oranges at the rate of 5 oranges for a rupee and 10 oranges for 3 rupees. What will be the average cost of the oranges?

A. 1/5
B. 6/25
C. 5/24
D. 1/4
E. 1/3
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B
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Babar spends equal amount in buying two types of oranges at the rate 04 Jun 2012, 05:42
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Smita04
Babar spends equal amount in buying two types of oranges at the rate of 5 oranges for a rupee and 10 oranges for 3 rupees. What will be the average cost of the oranges?
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The average cost per orange would be (total cost)/(total oranges).

Say Babar spends 3 rupees for each type of oranges. So, he would get 15 oranges of type A and 10 oranges of type B.

(total cost)/(total oranges)=(3+3)/(15+10)=6/25 rupees.
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Babar spends equal amount in buying two types of oranges at the rate 08 Jun 2012, 00:36
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It might be a basic question, but do we equalize the cost before calculating the average? What is conceptually wrong when I do 4/15?
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KarishmaB
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Babar spends equal amount in buying two types of oranges at the rate 08 Jun 2012, 03:06
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pavanpuneet
It might be a basic question, but do we equalize the cost before calculating the average? What is conceptually wrong when I do 4/15?
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It is given that he spent equal amount of money on both types. When you say 4/15, you are assuming that he bought 5 oranges for Re1 and 10 oranges for Rs 3 i.e. a total of 15 oranges for Rs 4 but that is not the case. The average cost will depend on how many oranges he bought of each type. It is not given how many oranges he bought of each type but it is given that he spent equal amount of money on both types so we can assume that he spent say, Rs3 for each type.
He will get 15 oranges of first type in Rs 3 and 10 oranges of the second type in Rs 3. Hence, average cost of the oranges = 6/25
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Babar spends equal amount in buying two types of oranges at the rate 10 Nov 2012, 04:59
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Let X and Y be the amount ( in the sense of the number of ..) bought in type 1 and type 2
the price of X = 1/5 and that of Y = 3/10 ( in ruppee of course)
X*1/5 = Y*3/10 ==> X = 3/2*Y
Av: (X/5 + 3Y/10)/(X+Y) = 6/25 (substitute X for Y)
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Babar spends equal amount in buying two types of oranges at the rate 23 Mar 2021, 03:32
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If 5a = 1 rup
Then 5b = 3/2 rup = 1.5 rup
(1+1.5)/(5+5) = 0.25 rup = 1/4 rup.
But it is not correct..
I'm lost :D
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Babar spends equal amount in buying two types of oranges at the rate 07 Sep 2025, 03:08
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