Capgemini Company Numerical Ability Averages

The average weight of 30 Students is 25. If the Heaviest and Lightest are excluded the average weight reduces by 2. If only the Heaviest is excluded then also the average reduces by 2. What is the weight of the Lightest?
A)20 B)32 C)23 D)42 E)None of these

Read Solution (Total 1)

total wt of 30 students is 30*25 = 750;
now by excluding heaviest and lightest weight, we get 25-2 = 23 as well as 30-2=28 and by multiplying 23*28 = 644;
so now total wt of heaviest and lightest = (750-644)=106;
By excluding heaviest wt we get avg weight becomes 25-2 = 23
so total weight = 23*29 = 667;
weight of heaviest = 750-667 = 83
weight of lightest = 106-83 = 23;
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Capgemini Other Question

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