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This question belongs to Arithmetic Ability Alligation
Alligation
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In what ratio must a grocer mix two varieties of tea worth Rs. 60 a kg and Rs. 65 a kg so that by selling the mixture at Rs. 68.20 a kg he may gain 10%?

Answer & Solution
Correct Answer: Option A
S.P. of 1 kg of the mixture = Rs. 68.20, Gain = 10%
C.P. of 1 kg of the mixture = Rs. $$\left( {\frac{{100}}{{110}} \times 68.20} \right)$$   = Rs. 62
By the rule of alligation, we have:
Alligation mcq solution image
∴ Required ratio = 3 : 2
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1 Comment
Ankit Upadhyay
Ankit Upadhyay 8 years ago
Given 110%=68.20
So 100%=X (assume)
After Cross multiplication we get X=62.
Now applying mixture concept
60 65
62
(65-62) (62-60)
=3 =2

There fore Ratio is =3:2