PLACEMENT AND TRAINING CENTRE UVCEAVERAGES 1.The average of 20 numbers is 0.Of them, at the most,How many may be greater than 0? (a)0 (b)1 (c)10 (d)19

2.If the mean of a,b,c is M and ab+bc+ca=0,then the mean of a^(2)+b^(2)+c^(2) is: (a)M^(2) (b)3M^(2) (c)6M^(2) (d)9M^(2)

3.Average of first 50 natural numbers is: (a)12.25 (b)21.25 (c)25 (d)25.5

4.Avearge of all odd numbers upto 100 is: (a)49 (b)49.5 (c)50 (d)51

5.The average annual income of certain agricultural workers is S and that of other workers is T. The no of workers is 11 times that of other workers.Then the average monthly income of all the workers is : (a)(S+T)/2 (b)(S+11T)/2 (c)(1/11S)+T (d)(11S+T)/12

6.A family consists of Grand parents,parents and 3 grand children.The average age of grand parents is 67years,that of parents is 35 years and that of grand children is 6years.What is the average age of the family? (a)28 4/7 (b)31 5/7 (c)32 1/7 (d)None of these

7.Out of 9 persons,8 persons spent Rs 30 each for their meals.The 9th one spent Rs 20 more than the average expenditure of all the nine.The total maney spent by all of them was: (a)Rs 260 (b)Rs 290 (c)Rs 292.50 (d)Rs 400.50

8.The average age of 8 students in a class is 16 years.The average age of 21 students is 14.What is the average age of remaining 14? (a)28.32 yrs (b)28.28 yrs (c)29 yrs (d)19 yrs

9.The batting average for 40 innings of a cricket player is 50 runs.His highest score exceeds his lowest score by 172 runs.If these two innings are excluded,the average of remaining 38 innings is 48 runs.The hiighest score is: (a)165 runs (b)170 runs (c)172 runs (d)174 runs

10.A company produces on an average 4000 item per month for the first three months.How many items it must produce on an average per month over the next 9 months,to average 4375 items per month over the whole? (a)4500 (b)4600 (c)4680 (d)4710

11.A pupil's marks were wrongly entered as 83 insteatd of 63.Due to that the average marks for the class got increased by half.The no of pupils in the class is (a)10 (b)20 (c)40 (d)73

12.The average monthly salary of 20 employees in an organisation is Rs 1500.If the manager's salary is added ,then the average salary increases by Rs 100.What is the manager's monthly salary? (a)Rs 2000 (b)Rs 2400 (c)Rs 3600 (d)Rs 4800

13.The average height of 8 persons increases by 2.5kg when a new person comes in place of one of them weighing 65kg.What might be the weight of the new person? (a)76 kg (b)85 kg (c)80 kg (d)None of these

14.A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and there by decreases his average by 0.4.The no of wickets taken by him till last match was (a)64 (b)72 (c)80 (d)85

15.A cricketer has cetain average for 10 innings.In the 11th innings he scored 108 runs,thereby increasing his average by 6 runs.His new average is: (a)48 runs (b)52 runs (c)55 runs (d)60 runs

16.A motorist travels to a place 150km away at an average speed of 50km/hr and returns at 30km/hr.His average speed for the whole journey in km/hr: (a)35 (b)37 (c)37.5 (d)40

17.The average age of husband and his wife was 23 years at the time of their marriage.After 5 years they have a one year old child.The average age of the family now is: (a)19 yrs (b)23 yrs (c)28.5 yrs (d)29.3 yrs

18.The average age of husband,wife and child three years ago was 27 years and that of the wife and child 5 years ago was 20 years.The present age of the husband is (a)35 yrs (b)40 yrs (c)50 yrs (d)None of these