On the second test, the class mean was 80 and the mean girl’s scores was 75. What was the mean of the boy’s scores?
4 answers
need to know the number of boys and girls
Mrs. Gifford's class consists of 15 girls and 25 boys.
On the first test the mean of the girls’ scores was 80 and the mean of the boy’s scores was 70. What was the class mean? (Remember the class mean is not just averaging the two means)
On the first test the mean of the girls’ scores was 80 and the mean of the boy’s scores was 70. What was the class mean? (Remember the class mean is not just averaging the two means)
2nd test ... (15 * 75) + (25 b) = 40 * 80
1st test ... (15 * 80) + (25 * 70) = 40 m
1st test ... (15 * 80) + (25 * 70) = 40 m
whats the answer