The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2 What was the mean score of the girls?
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Step-by-step explanation:
Mean score of ten boys=15
Total scoring of boys=15*10=150
Mean score of all students=16.2
Total scoring of students=25*16.2=405
So, scoring of girls=405-150=255
Total girls=25-10=15
Mean score of girls=255/15=17
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