Practice | Hashtable

1. In what ratio must water be mixed with milk to gain $16 \frac{2}{3} %$ on selling the mixture at cost price?

A. 1 : 6

B. 6 : 1

C. 2 : 3

D. 4 : 3

Solution:

Let C.P. of 1 litre milk be Rs. 1
S.P. of 1 litre of mixture = Rs. 1, Gain =

\frac{50}{3}

%
∴ C.P. of 1 litre of mixture =

100 \times \frac{3}{350} \times 1

\frac{6}{7}

BY the rule of alligation, we have:
Alligation mcq solution image

∴ Ration of water and milk =

\frac{1}{7}

\frac{6}{7}

= 1 : 6

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