Question
Class 5 Goodness and 5 Kindness had the same number of pupils. The ratio of the number of girls in 5 Goodness to the number of girls in 5 Kindness was 5 : 9. The ratio of the number of boys in 5 Goodness to the number of boys in 5 Kindness was 3 : 1.
  1. What is the ratio of the number of boys to the number of girls in Class 5 Goodness?
  2. If there were 21 fewer boys than girls in Class 5 Kindness, how many pupils were there each class?
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(a)

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(b)

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Class 5 Goodness and 5 Kindness had the same number of pupils. The ratio of the number of girls in 5 Goodness to the number of girls in 5 Kindness was 5 : 9. The ratio of the number of boys in 5 Goodness to the number of boys in 5 Kindness was 3 : 1.
  1. What is the ratio of the number of boys to the number of girls in Class 5 Goodness?
  2. If there were 21 fewer boys than girls in Class 5 Kindness, how many pupils were there each class?