Question
PSLE
Mr Tay asked some pupils to choose their favorite colour for a vest. The results are shown in the graph.
  1. What is the ratio of the number of pupils who chose black to the number who chose blue to the number who chose red?
  2. Mr Cheong ordered a total of 72 vests in the three colours according to the same ratio in part (a). How many more red than black vests were ordered?
3 m
(a)

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(b)

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PSLE
Mr Tay asked some pupils to choose their favorite colour for a vest. The results are shown in the graph.
  1. What is the ratio of the number of pupils who chose black to the number who chose blue to the number who chose red?
  2. Mr Cheong ordered a total of 72 vests in the three colours according to the same ratio in part (a). How many more red than black vests were ordered?