Out of 20 boys, 6 are each of 1 m 15 cm height. 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is

Options

A. 1 m 12 cm
B. 1 m 12.1 cm
C. 1 m 21.1 cm
D. 1 m 21 cm

Answer

B