Number 9
2 marks · EasyIn a country, sales tax is charged at a rate of 10% on all electronics. Eva buys a tablet for $220. She pays $242. Has she paid the correct total amount? Justify your answer.
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Yes, Eva has paid the correct amount.
Also accept: Yes, the total is correct; She paid the correct amount
Common mistakes: Calculating tax on $242, not $220; Subtracting instead of adding tax
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Marking points
M1 · 1 mark · Finds 10% of $220 (= $22)
A1 · 1 mark · Adds to $220 and correctly checks $242 is correct
Worked solution
So yes, Eva paid the correct amount.