6. There are three sections of a class in a school. The number of students in the three sections is 38, 40 and 42 and the average
age of the students in these sections separately is 15.3 years, 16.5 years and 15.9 years respectively. What is the average age
of the lass?
O 15.91 years
15.92 years
15 years
15.11 years
Answers
Answer:
92 yrs I beleive bc I just had the same question and that is what i put and got it right
Step-by-step explanation:
MARK ME BRAINLIEST
There are three sections of a class in a school. The number of students in the three sections is 38, 40, and 42 and the average age of the students in these sections separately is 15.3 years, 16.5 years, and 15.9 years respectively. The average age of the class is 15.91 years.
Given:
The number of students in the three sections is 38, 40, and 42 and the average age of the students in these sections separately is 15.3 years, 16.5 years, and 15.9 years respectively.
To find:
The average age of the class.
Solution:
Total age of 1st section = class average × No. of students.
= 15.3 * 38
= 581.4
Total age of 2nd section = class average × No. of students.
= 16.5 * 40
= 660
Total age of 3rd section = class average × No. of students.
= 15.9 * 42
= 667.8
Now, Total number of students in all the sections = (38 + 40 + 42)
= 120
Total age of all the sections = (581.4 + 660 + 667.8)
= 1909.2
Average age = Total age of all sections / total number of stufents.
= 1909.2 / 120
= 15.91
Therefore the average age of the class would be 15.91 years.
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