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The average height of 40 student is 163 cm. On a particular day, three student A, B, C were absent and the average of the remaining 37 student was found to be 162 cm. if A, B have equal height and the height of C be 2 cm less than that of A, find the height of A ?
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- 176 cm
- 166 cm
- 180 cm
- 186 cm
Correct Option: A
Let the height of A , B, C be y cm, y cm and (y - 2) cm respectively
Then, y + y + (y - 2) = 163 x 40 - 162 x 37
⇒ 3y - 2 = 526
∴ y = 176 cm
