Two different kinds of rice of quantities R1 and R2, costing Rs. 60 per kg and Rs. 75 per kg, respectively, are mixed to get a mixture that costs Rs. 65 per kg. What is the ratio in which R1 is mixed with R2?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 2 : 1.
Let the ratio be x : y
60x + 75y = 65(x + y)
⇒ 60x + 75y = 65x + 65y
⇒ 5x = 10y
⇒ x/y = 10/5 = 2/1