Question

Light bulbs cost £3.40 each.

Yasmin buys as many as she can with £30.
How much change should she get?
Give your answer in pounds, £.

Answer 1

Answer: 2.80 pounds

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Work Shown:

x = number of light bulbs

3.40x = total cost to buy x light bulbs, cost is in pounds

3.40x = 30

x = 30/(3.40)

x = 8.823529 approximately

Rounding down, we get 8

Note that,

• 3.40*8 = 27.20 pounds which is under budget
• 3.40*9 = 30.60 pounds which is over budget

Therefore, the highest number of bulbs that can be bought is 8.

The change given will be 30-27.20 = 2.80 pounds