How do you solve this sum? I buy 1 large pack of batteries for £5 and 2 small packs priced at £2 per pack. What is the average cost of a battery across 3 packs?

How do you solve this sum? I buy 1 large pack of batteries for £5 and 2 small packs priced at £2 per pack. What is the average cost of a battery across 3 packs?
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The question needs to state how many batteries there are in each pack.
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1 Answer

Let the number of batteries in a large pack be m and n in that of a small pack

Average cost of a battery= Total cost/Total number of batteries

                                        =(£5+£2 £2 )/m+n+n=£9/(m+2n)

by Level 8 User (32.3k points)

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