Question

Amina posts three large letters the postage is the same for each letter she pays with a £20 note her change is £14.96 what is the cost of posting one letter?

Answer 1

c = £1.68

Explanation:

Given:-

- Amina posts 3 letters

- Total amount paid, P = £ 20

- Change received, R = £14.96

Find:-

what is the cost of posting one letter?

Solution:-

- The cost of 3 letters (C) can be determined from the amount paid and change received as follows:

C = P - R

C = 20 - 14.96

C = £5.04

- The cost of single unit (c), assuming all units sold are identical then we have:

c = C / total units purchased

c = £5.04 / 3

c = £1.68

Answer 2

The cost of posting one letter = £1.68

Explanation:

Total amount Amina has = £20

Amina's change = £14.96

Total cost spent on posting the letters = £20 - £14.96 = £5.04

And we're told that she posts 3 letters in total, with the cost of posting each letter the same.

Cost of posting 3 letters = £5.04

Cost of posting only 1 letter = (£5.04/3) = £1.68

Hence, the cost of posting a letter = £1.68

Hope this Helps!!!