Wipro Company Numerical Ability Averages

The average temperature of all 7 days of the week is 30, that of the first 3 days is 28 and of the next 3 days is 31. What is the temperature on the last day of the week?
A. 31
B. 30
C. 28
D. 33
E. 29

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Wipro Other Question

The average age of a husband, his wife and son 3 years ago was 27 years and that of his wife and son 5 years ago was 20 years. What is the husband’s present age?
A. 35 years
B. 37 years
C. 32 years
D. 40 years
E. 38 years
The average age of A and B is 20 years. If C replace A the average would be 19 and if C replaces B the average would be 21. What are the ages of A, B and C?
A. 22, 20, 18
B. 22, 18, 20
C. 18, 20, 22
D. 18, 22, 20
E. 22, 19, 20