The average age of 10 girls is 20 years and the average age of 15 boys is a years. If the average age years of all the boys and girls is 23 years, find the value of (a) .
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The average age of 10 girls is 20 years and the average age of 15 boys is a years. If the average age years of all the boys and girls is 23 years, find the value of (a) .
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Answer:
3 is = {a} this is the best way to get the answers
Answer:
25 years
Step-by-step explanation:
The average age of 10 girls is 20 years
Total age of girls = 20 * 10
the average age of 15 boys is a years
Total age of boys = 15 a
Average = Total value / no of girls
On solving we get
a = 25 years