In a classroom there are 16 boys and 12 girls. Average age of each boy and each girl is 21 years and 17 years respectively. The sum of ages of all the boys, girls and a teacher whose age is ‘x’ years is 580 years. Find the value of ‘x’.
Sum of ages of all boys = 16 x 21 = 336 Sum of ages of all girls = 12 x 17 = 204 So, 336 + 204 + x = 580 => x = 40
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