Question

6. The cost of the Red, Green and Blue colours per kg is Rs. 20,
Rs. 15 and Rs. 18 respectively. Rang Mahal is a renowned
building in which these three colours are being used in the
ratio of 3: 2:4. The average cost of all the three colours used
per kg is :
(a) 18
(b) 20
(c) 17.66
(d) can't be determined
explain to me please.​

Answer 1

Step-by-step explanation:

20×3+15×2+18×4=162

162÷9=18