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