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Question
The average height of 16 students is 142 cm. If the height of the teacher is included, the average height increases by 1 cm. The height of the teacher is
Options
156 cm
159 cm
158 cm
157 cm
MCQ
Solution
159 cm
Explanation:
Total height of 16 students = 16 × 142
Let teacher's height = x cm
Then, `(16 xx 142 + x)/17` = 143
x = 143 × 17 – 16 × 142
= 2431 – 2272
= 159 cm
Height of teacher = (142 + 17) cm = 159 cm.
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