PSLE A group of pupils was asked to choose one spaghetti set from beef, tuna, mutton and egg. The table represents the pupils' choices. The pupils' choices were also represented by a bar graph but the names of the spaghetti sets were not shown. What was the total number of pupils who chose mutton and beef spaghetti sets?
Spaghetti Sets |
Pupils |
Beef |
60% |
Tuna |
5% |
Mutton |
15% |
Egg |
20% |
Number of pupils who chose tuna spaghetti sets is the least. So it is represented by the shortest bar.
Number of pupils who chose tuna spaghetti sets = 15
5% of pupils = 15
1% of pupils = 15 ÷ 5 = 3
Percent of pupils who chose mutton spaghetti sets = 15%
Percent of pupils who chose beef spaghetti sets = 60%
Percent of pupils who chose mutton and beef spaghetti sets
= 15% + 60%
= 75%
Total number of pupils who chose tuna and egg spaghetti sets
= 75 x 3
= 225
Answer(s): 225