Question

The average height of a family of 5 members is 150 cm. A boy of height 30 cm is born. Find the average height of the family now?
1. 130 cm
2. 135 cm
3. 140 cm
4. 125 cm

Answer 1

Correct Answer - Option 1 : 130 cm

GIVEN:

The average height of a family of 5 members = 150 cm

Height of baby born = 30 cm

FORMULA USED:

Average = Sum of numbers / Total numbers

CALCULATION:

Total height of all the family members earlier = 5 × 150 = 750 cm

Now,

Total height of all the family members now = 750 + 30 = 780 cm

Hence,

Average height of the family now = 780/6 = 130 cm