Two sections of a class took the same quiz. Section A had 15 students who had a mean score of 80, and section B had 20 students
2 answers:
Answer:
Option B. 85
Step-by-step explanation:
Two sections of a class took the same quiz.
Mean score of section A of 15 students = 80
Mean score of section B of 20 students = 90
We will calculate the approximate mean score for all the students.
The pool mean is the mean of means of two or more groups. We will find it by this formula =
=
= 85
The approximate mean score for all the students on the quiz was 85.
You might be interested in
Answer:
5 tubes of blue paint are used for 15 tubes of white paint.
Step-by-step explanation:
Given:
To paint a mural painter uses 2 tubes of blue paint for every 6 tubes of white paint
Hence,
6 tubes of white paint = 2 tubes of blue paint
Now we need to find number of blue paint tubes used for 15 tubes of white paint.
6 tubes of white paint = 2 tubes of blue paint
15 tubes of white paint = number of blue paint tubes used for 15 tubes of white paint
Hence we will used unitary method to find the same;
Number of blue paint tubes used =
Hence 5 tubes of blue paint are used for 15 tubes of white paint.