Q. Average weight of 20 girls in a class is 25 kg, when the age of a teacher is included the average weight increased by 2 then find out the weight of the teacher.
Answer 67
EXPLANATION
It is given that average weight of 20 girls is 25 kg,
let the teacher’s weight is X kg
25 = sum of the weights of 20 girls / 20
sum of the weights of 20 girls = 500
25 + 2 = (500 + X) /21
X = 67 kg
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Showing posts with label distance. Show all posts
Showing posts with label distance. Show all posts
Thursday, 14 May 2020
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