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The average weight of 4 persons is 46 kg. The heaviest person’s weight is 28 kg more than the lightest person’s weight. If the average weight of the...
The average weight of a group of NN children is (N+1)(N + 1) kg. When a child weighing 36.5 kg leaves the group, the average weight decreases by 0.5 kg....
The average marks scored by 30 boys and 40 girls are 75 and 85 respectively. Find the average marks scored by all the students together. (Answer should ...
There are 5 consecutive odd and 3 consecutive even numbers. The sum of five consecutive odd numbers is 120 and the lowest even number is 4 more than the...
The average weight of a group of five persons, A, B, C, D, and E is 60 kg. If another person K joins the group then the average weight of the group is d...
The average of 10 numbers is 30. If one of the numbers is excluded, the average of the remaining numbers becomes 28. Find the excluded number.