Theory question 104
Data PresentationThe diagram above shows the bar charts representing the number of vehicles manufactured by a company in January, February and March, 1992. (a) How many vehicles were produced in February? (b) What fraction of the vehicles manufactured in February were cars? (c) How many buses were produced altogether from January to March, 1992? (d) What is the ratio in lowest term of the number of lorries produced in February to that in March?
Show the model answer
Readings from the chart (car, lorry, bus): January 10, 15, 20; February 40, 25, 30; March 5, 35, 50.
(a) February: 40 + 25 + 30 = 95 vehicles.
(b) Cars in February: 40/95 = 8/19.
(c) Buses: 20 + 30 + 50 = 100.
(d) Lorries February : March = 25 : 35 = 5 : 7.
Read each bar against the vertical scale, then add or compare as asked.