Question 197

The average height of 21 girls was recorded as 148 cms. The teacher’s height was added and the average increased by one. What was the teacher’s height?

Solution

Total height of girls=21*148=3108

After teacher's height is included, No. Of persons =22

Average height=148+1=149

Total height=22*149=3278

Teacher's height = 3278-3108 = 170cms.

Option C is the right answer.

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