Question

bought 15 books and 12 pens. Their average cost is Rs.70.50. If the average cost of the
12 pens is Rs.1.50, what is the average cost of the books?​

Answer 1

Answer:

you said the cost of one book is twice as much as a pen.

which means Three books are equal to 6 pens

3 books=6 pens

we have 4 pens

6 pens+ 4 pens= 10 pens

cost of 3 books and 4 pens are Rs: 520

520/10=52

cost of one pen is 52.

Answer 2

Answer:

69.00

Step-by-step explanation:

15 books and 12pens cost Rs 70.50 an average so 12 pens cost Rs 1.50 so 70.50-1.50 =69.00 ans- 69.00