Question

The total height of 10 persons is 2,100 cm. One person of height 300 cm is excluded from the group. Find the average height of the remaining persons?
1. 100 cm
2. 150 cm
3. 200 cm
4. 180 cm

Answer 1

Correct Answer - Option 3 : 200 cm

Given:

Total 10 person’s height = 2,100 cm

Excluded person’s height = 300 cm

Concept:

Average height = Total height/Total persons

Solution:

Total 10 person’s height = 2,100 cm

Excluded person’s height = 300 cm

Remaining person’s total height = 2,100 - 300 ⇒ 1,800 cm

Remaining persons = 9

Average height of remaining persons = 1,800/9 ⇒ 200 cm