In a class of 5 students, average weight of the 4 lightest students is 40 kgs, average weight of the 4 heaviest students is 45 kgs. What is the difference between the the maximum and minimum possible average weight overall?
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The difference between total weight of 4 heaviest and 4 lightest is 180-160=20
The possible weights are 35,40,4045,55
The difference between maximum and minimum =20
The possible weights are 35,40,4045,55
The difference between maximum and minimum =20
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