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The average height of 21 girls was recorded as 148 cm. When the teacher's height was included, the average of their heights increased by 1 cm. What was the height of the teacher?

A156 cm

B168 cm

C170 cm

D162 cm

Answer:

C. 170 cm

Read Explanation:

Height of the teacher =(22x149)-(21x148) =3278-3108=170cm


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