5. The average age of the boys in a class
is 12 years. The average age of the
girls in the class is 11 years. There are
50% more girls than boys in the class.
Which one of the following is the
average age of the class (in years)?
Answers
Answered by
9
Answer:
11.4
Step-by-step explanation:
boy :girl = 2:3 (50%=1/2)
A/Q
2*12+3*11=57
average = 57÷5 =11.4
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