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

Spaghetti Sets	Pupils
Beef	40%
Tuna	10%
Hotdog	15%
Chicken	35%

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 = 30

10% of pupils = 30

1% of pupils = 30 ÷ 10 = 3

Percent of pupils who chose hotdog spaghetti sets = 15%
Percent of pupils who chose beef spaghetti sets = 40%

Percent of pupils who chose hotdog and beef spaghetti sets
= 15% + 40%
= 55%

Total number of pupils who chose tuna and chicken spaghetti sets
= 55 x 3
= 165

Answer(s): 165