dnarioproctor
20.09.2020 •
Mathematics
A class has 30 boys and 20 girls. The average age of
boys is 12 yrs and girls 12 yrs. What is the
average age of the whole class."
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Ответ:
whole age of class is 12 + 12 ÷2
= 24÷2
= 12
Step-by-step explanation:
so the average of whole class is 12Ответ:
C) Only -3 is an extraneous solution
Step-by-step explanation: