Question
 A can do a piece of work in 12 days and B can do it in
18 days. In how many days will they complete the work together?Solution
ATQ, A's 1 day work = 1/12 B's 1 day work = 1/18 Together: 1/12 + 1/18 = 3/36 + 2/36 = 5/36 Time taken = 36/5 days = 7 (1/5) days Answer: B. 7 (1/5) days
The average of 7 numbers is 32. If one number 28 is removed, what is the approximate average of the remaining 6 numbers?
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