Question

in two adjacent building having 80 and 60 people respectively of which 60% and 80% read newspaper respectively. the average rate of people reading newspaper (in percent) is

Answer 1

In a building with 80 people, among which 60% read newspaper.

Hence, number of people reading newspaper in that building is 60/100 x 80 = 48. In the second building having 60 people, 80% read newspaper.

Hence, number of people reading newspaper in that building is 80/100 x 60 = 48.

The total number of people in 2 buildings = 80 + 60 = 140.

Hence, the average rate of people reading newspaper is (48 + 48) / 140 x 100 = 68.5%.