Question 113
A Set A consists of integers 27, 28, 30, 32 and 33. If integer k is included in the average of set A will increase by 30%. What is the value of integer K ?
Solution
Average of set A = $$\frac{(27+28+30+32+33)}{5}=\frac{150}{5}=30$$
New average (by adding k) = $$30\times\frac{130}{100}=39$$
=> $$\frac{150+k}{6}=39$$
=> $$150+k=39\times6=234$$
=> $$k=234-150=84$$
=> Ans - (C)
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