Question

Two groups of students wrote a test. The average score of 25 students of the 1st group was
120, while that of the 35 students in the second group was 126. What is the average score of both group​

Answer 1

Answer:

The average of both the groups is 3705.

Step-by-step explanation:

It's given that the average marks of 25 students are 120 and of 35 students are 126.

So to find the average marks of both the groups.

we need to find the total marks obtain by each group.

we know that,

average (mean) = sum of values/number of values.

For group 1

let the total marks be x

average ( group 1) = total marks/number of students

120 = x/25 …given

x = 120 × 25

x = 3000

For group 2

let the total marks obtained be y.

average (group 2) = y/35

126 = y/35

y = 126 × 35. …given

y = 4410

Average of both the groups

= (x + y)/2

= (3000 + 4410)/2

= 7410/2

= 3705

Thus, the average of both the groups is 3705.