Question

C) 20 blank CD-Roms cost £3.20
How much do 75 CD-Roms cost?

Answer 1

the cost of 75 CD Roms is £12

Explanation:

The computation of the 75 CD roms cost is shown below:

Since it is mentioned that

for 20 blank CD roms it cost £3.20

So for 75 CD Roms, the cost would be

= £3.20 × 75 ÷ 20

= £12

Hence, the cost of 75 CD Roms is £12