PSLE
A group of pupils was asked to choose one spaghetti set from mutton, egg, hotdog and beef. 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 hotdog and mutton spaghetti sets?

Spaghetti Sets	Pupils
Mutton	30%
Egg	35%
Hotdog	10%
Beef	25%

Number of pupils who chose hotdog spaghetti sets is the least. So it is represented by the shortest bar.

Number of pupils who chose hotdog spaghetti sets = 40

10% of pupils = 40

1% of pupils = 40 ÷ 10 = 4

Percent of pupils who chose mutton spaghetti sets = 30%
Percent of pupils who chose egg spaghetti sets = 35%

Percent of pupils who chose mutton and egg spaghetti sets
= 30% + 35%
= 65%

Total number of pupils who chose hotdog and mutton spaghetti sets
= 65 x 4 
= 260

Answer(s): 260