A shop sold 2400 computers of two brands, A and B, from July to December 2022. The pie chart shows the percentage of these computers sold in each month, and the table shows the ratio of brand A to brand B computers sold in each month.
If 25% of the brand B computers sold in November were sold at a discount, how many brand B computers were sold without a discount in November?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 120
The pie chart gives November’s share of all 2400 computers, the ratio splits that share between the brands, and the computers not sold at a discount are the remaining 75% of brand B.
Computers sold in November \(=12\%\) of \(2400=288\)
Brand A : brand B in November \(=4:5\), so brand B \(\displaystyle =\frac{5}{9}\times288=160\)
Sold without discount \(=100\%-25\%=75\%\) of 160 \(=120\)