The ratio of the number of students in 3 sections A, B and C is 3 : 7 : 8. If there are a total of 360 students in these sections, find the number of students in section A.
Explanation:
Let the number of students in A, B and C be 3x, 7x and 8x respectively.
3x + 7x + 8x = 360
⇒ x = 20
⇒ 3x = 60
Hence, 60.
Alternately,
Number of students in section A = 33+7+8 × 360 = 60
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