Postal or Sorting Assistants Model Paper 1 With Solutions

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Question : 20 of 100

Marks: +1, -0

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

1 m 12 an
1 m 12.1 an
1 m 21. Ian
1 m21 cm

Solution:

Average height

= {6×(l.l5) + 8×(l.l0)+6(l.l2)}/20

⇒

{22.42}/20=1.121

or 1m 12.1 cm

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