Question

the average age of 25 boys in standard 7 is 12 years 9 months average age of 25 girls in standard 7 is 12 years 6 month find the average of the whole class​

Answer 1

Answer:

12 yrs 7mths 15 days

Step-by-step explanation:

average age of boys=12 yrs 9 mths=12 3/4 yrs=51/4 yrs.

average age of girls=12 yrs 6 mths=12 1/2 yrs=25/2 yrs=50/4 yrs.

Average age of whole class=(51/4 + 50/4)/2=(101/4)/2=101/8=12 5/8 yrs

=12 yrs 7mths 15 days

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