Respuesta :
Answer:
The cost of posting one letter = £1.68
Step-by-step 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!!!
Answer:
c = £1.68
Step-by-step 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
