Question

If tea that costs ₹7.50 per kg is mixed with tea that costs ₹10.50 per kg in the proportion of 2:1 then, what is the cost (in ₹) of the resultant mixture per kg?

• A. 7.00
• B. 8.50
• C. 7.50
• D. 9.00

Answer 1

Answer:

B. 8.50

Prices and ratio:

• ₹7.50 per kg → 2 parts

• ₹10.50 per kg → 1 part

  Cost of mixture per kg:

$\frac{(7.50 \times 2) + (10.50 \times 1)}{2 + 1}$
$= \frac{15 + 10.50}{3}$
$= \frac{25.50}{3}$
$= 8.50$

Cost of the resultant mixture = ₹8.50 per kg