feedback on good maths books[for class 4to7]
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Question
The ratio of boys to girls in a group is 5:3. If there are 18 more boys than girls, work out how many people there are in total
Answer
72 students
Step-by-step explanation:
Let the ratio of boys to girls be 5x : 3x
A/q
no. of boys = 18 + no. of girls
=> 5x = 18 + 3x
=> 5x - 3x = 18
=> 2x = 18
=> x = 18/2
= 9
Now,
No. of boys = 5x
= 5 × 9
= 45
No. of girls = 3x
= 3 × 9
= 27
Total = 45 + 27 = 72
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