Answers to the questions involving interpreting data

Example (1)
(1) (D)The Korker with 39% gross profit on each sale.

(2) (B)The Knight with a gross profit of 612 x £3 000 = £1 836 000.

(3) (D)The Korker which costs an average of (£5 500/62) = £88.71 per fault.

(4) (E)Can't say, as some cars may have had more than one fault.

Example (2)
(1) (D) (37/23) x 100 = 160.9%.

(2) (A)True. Pollution has risen by 50% in rural areas and only 20% in urban areas.

(3) (C)Can't say. The rise in pollution in each case is given as a % of the level in 1997 and we aren't told what this was. For example, if urban areas had a pollution level of 100 days and rural areas had a pollution level of 10 days in 1997, then in 1998 these levels would have risen to 120 days and 15 days respectively. Towns would still be worse.

Example (3)
(1) (A)15 000.
3 300 is 22% of the total number of 16-year-olds in 1999
so 3 300 = (22/100) x this total number of 16-year-olds
so this total number = (100/22) x 3 300 = 15 000.

(2) (D)20.4%.
22% smoked daily in 1999.
This was an increase of 8% from the percentage in 1992
so this 22% = (108/100) x the percentage in 1992
therefore the percentage in 1992 = (100/108) x 22 = 20.4.

Example (4)
(1) (B)In June, when 40 000 boxes of each were sold.

(2) (C) 50 000 Nutchox and 30 000 Frutichox were sold.
The % of the total which were Nutchox was (50 000)/(80 000) x 100 = 62.5%

(3) (B)In Feb, 20 000 boxes of Nutchox were sold, so 2 000 000 bars.
10 000 boxes of Frutichox were sold, so 1 200 000 bars.
The percentage of the total number which were Frutichox is

(1 200 000)/(3 200 000) x 100 = 37.5%.

(4) (B)Equal numbers of individual bars were sold in April.

(5) (D)Frutichox sales made more money in March, April and June.

(C) Jenny Olive 2000.
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