Question

please solve step by step

Answer 1

Answer:

22.95

Step-by-step explanation:

Interesting question.

Average test score

=(Total of test scores)/(Total no. of students)

=T/#

So, 24 = Total(7A)/20

and 21 = Total(7B)/21

Net avg of class 7

= (Total(7A) + Total (7B))/(20+21)

= (24×20 + 21×21) / (41)

= (480+441)/41

= (921)/41

= 22.95

Answer 2

Step-by-step explanation:

the average test score of class 7A of 20 students = 24 the average test score of class 7B of 21 students = 21

the total average of test score of class 7 = ??

% = 100

add the score of both classes = 24 + 21= 45

now take out the % = 45/100

= 0.45

the % or the average of the class score is 0.45 .

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