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1 . The average marks obtained by 120 candidates in a examination 35. if the average marks of passed candidate is 39 and that of the failed candidates is 15,what is the number of candidates who passed?
A. 100 B. 150
C. 200 D. 250

2 . The average age of 8 persons in a committee is increased by 2 years when two men aged 35 years and 45 years are substituted by two women.Find the average age of these two women.
A. 47 years B. 48 years
C. 49 years D. 50 years

3 . In a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy.Find the age of new boy.
A. 11 years 10 months B. 12 years 2 months
C. 13 years 6 months D. 14 years 8 months

4 . One -third of certain journey is covered at the rate of 25kmph,one-fourth at the rate of 30kmph and the rest at 50 kmph.Find the average speed for the whole journey.
A. 33.333 Km/hrs B. 22.233 Km/hrs
C. 66.633 Km/hrs D. 43.463 Km/hrs

5 . The average salary of the entire staff in a office is Rs 120 per month.The average salary of officers is Rs 460 and of non officers is Rs 110. If the number of officers is 15,then find the No of non-o
A. 230 B. 350
C. 510 D. 458