Question

In what ratio must water be mixed with milk costing Rs.12 per litre to obtain a mixture worth of Rs.8 per litre?

• A. $1:2$
• B. $2:1$
• C. $2:3$
• D. $3:2$

Answer 1

The correct option is A $1:2$

By the rule of allegation:
$C.Pof1literofwater=0$
$C.Pof1literofmilk=12$
$MeanPrice\left(P\right)=8$
$d-m=12-8=4$
$m-c=8-0=8$
$\therefore Ratioofwaterandmilk=4:8=1:2$