Question
In a classroom there are 14 boys and 11 girls. Average age of each boy and each girl is 21 years and 15 years respectively. The sum of ages of all the boys, girls and a teacher whose age is ‘x’ years is 500 years. Find the value of ‘x’.
Solution
Sum of ages of all boys = 14 x 21 = 294 Sum of ages of all girls = 11 x 15 = 165 So, 294 + 165 + x = 500 => x = 41
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