Question

9. The average height of a group of people is 6 ft. 10 more people are
added with an average height of 5 ft. find the average height of the
group of people consisting of 60 people.​

Answer 1

Answer:

1. let the sum of height of ten people be x.

then the average will be,

x upon 10 is 6.

x is 6*10

x is 60.

2. the average of the heights of next set of 10 people is 5.

here, let the sum of heights be x.

x upon 10 is 5.

x is 5*10.

x is 60.

Now, we got the sum of all heights of all .

20 people.

let's add both of them.

60+50

110.

the average of all 20people will be,

110/20

5.2.