LAST TIME REVISION (AVERAGE) -1 ++

1) Find the averagebof all prime numbers between 20 and 50.
a) 35.857 b) 35.657 c) 34.857 d) 36.657

2) The average of the first numbers is equals to 1234.
A) odd b) even c) Prime d) natural 

3) what is the average of first 39 Even Numbers ?
a) 39 b) 40 c) 20 d) 68 

4) what is the average of first 11 multiples of 11?
a)22 b) 44 c) 55 d) 66

5) The average of series of 21 numbers is equals to 43. The average of the first 11 of then is 33. The average of the last eleven numbers is 53. The 11th number of the series is ..
a) 43 b) 47 c) 33 d) 46 

6) The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is 
a) 37.5 b) 37.9 c) 33.6 d) 38 

7) if 31x + 31y= 403, then what is the average of x and y
a) 3.5 b) 5 c) 6.5 d) 13 

8) The average height of 50 bats is 126 cm. Some bata of average height 120cm are removed. if the new average height is 130cm, then how many bats are remaining ?
a) 12 b) 20 c) 16 d) 30 

9) Among four bags, average weight of last three bags is 18 kg and the average weight of first three bags is 19 kg. If the weight of the last bag is 22 kg, then what is the weight(in kg) of first bag ?
a) 32 b) 24 c) 33 d) 25

10) the average weight of Simran, Owais and Kushi is 65 kg. If the average weight of Simran and Owais be 63 kg and that of the Owais and Khushi is 70 kg, then the weight of Owais is..
a) 41 b) 71 c) 88 d) 46 kg 

11) In a class of 60 students there are 30 girls. The average weight of these girls is 58 kg and average weight of the full class is 63 kg. what is the average weight of the boys of the class ?
a) 67 66 b)  66 c) 68 d) 65 

12) In a certain year, the average monthly income of a person was Rs3400, For the first 8 months of the year, his average monthly income was Rs3160 and for the last 5 months, it was Rs4120. His income in the 8 month of the year was?
a) 5000 b) 5520 c) 5080 d) 15520

13) The average age of four brothers is 14 years. If their father is also included,  the average is increased by 4 years. The age of the father(in yr) is
a) 36  b) 34  c) 40  d) 38 

14) A boy buys 5 pencil at Rs3 each, 3 erasers at Rs2 each and 3 sharpeners at Rs5 each . What is the average expenditure( in rupees) per article ?
a) 3.27 b) 3.5 c) 4 d) 5 

15) The average mark of 72 students is shown as 69. It includes a wrong entry of 45 marks instead of 54 marks. The correct average is 
a) 68.57 b) 69.125 c) 68.625 d) 69.375

16) The average weight of the Somdev, Gurudev and Ritu is 85kg. if the average weight of the somdev and Gurudev be 79 kg and that of gurdev and Ritu be 73 kg, then the weight of gurdev is
a) 78 b) 49 c) 72 d) 90 

17) A company produces an average of 4000 items for month for the first 3 months. How much items, it must produce on average per month over the next 9 months to average 4375 items per month over the whole year ?
a) 2800 b) 3600 c) 4500 d) 6400

18) The average age of 15 persons is 32 years. If two more persons are added, then the average is increased by 3 years. The new persons have an age difference of 7yr between them. The age (in years) of the elder among the new persons is
a) 58 b) 50 c) 61 d) 54 

19) the mean of marks secured by 55 students in division -A of class X is 55, 45 students of division-B is 51 and that of 40 Students of division -C is 49. what is the mean of marks of the students of three division of class X?
a) 51.3  b) 50.6 c) 52  d) 53.4 

20) The average of 14 girls and their teacher's age is 15 years. if the teacher's age is excluded , the average age reduced by 1. what is the age of teacher?
a)  30 b) 29  c) 40 d) 36 

21) In the first 26 overs of a cricket match, the run rate was 5.4 runs/over. what is the required run rate in the remaining 24 overs to reach the target of 294 runs ?
a) 7  b) 6.4 c) 7.6 d) 5.8

22) A boy bought 50 chocolates for Rs1000. If the average price of 30 chocolates is Rs25, then what is the average price(in Rs) of the remaining chocolates?
a) 10 b) 12.5 c) 15 d) 17.5

23) The average revenues of 9 consecutive years of a company is Rs75 lakhs . If the average of first 5 year is  71 lakh and that of last 5 year is 83 lakhs , find the revenue for the 5th year 
a) 88 b) 84 c) 86 d) 82

24) A factory buys 7 machines 2 machines A, 2 muchines B and rest machine C. Prices of the Machines are Rs95000 each, Rs75000 each and Rs43000 each respectively. Calculate the average cost of these machines?
a) 71000 b) 67000 c) 75000 d) 65500 

25) Among three numbers , the first is twice the second and thrice the third. If the average of three numbers is 429, then what is the difference between the first and the third number?
a) 412 b) 468  c) 517 d) 427 

26) There are three numbers. If the average of any two of them is added to the third number, the sums obtained are 177, 163 and 138. what is the average of the largest and the smallest of the given numbers?
a) 76 b) 79 c) 81 d) 67 

27) A student finds the average of ten 2- digit numbers . While copying numbers, by mistake, he writes one number with its digits interchanged. As a result his answer is 1.8 less than the correct answer. The difference of the digits of the numbers in which he made mistake, is 
a) 3 b) 2 c) 4 d) 5

28) Given four different numbers , the average of first three numbers is 4 times the fourth number and the average of all four numbers is 52. what is the average of the first three numbers ?
a) 39 b) 65  c) 72 d) 64 

29) 10 years ago the average age of a family of five was 38 yrs. Now, two new members join whose age difference is 8yr. If the present average age of the family is the same as it was 10yrs ago, what is the age (in yr) of the new younger member?
a) 15 b) 9 c) 10 d) 17

30) The total number of student in Class A and B is 96. The number of student in A is 40% more than that in B. The average weight (in kg) of the students in B is 50% more than that of the students in A. If the average weight of all the students in A and B taken together is 58kg, then what is the average weight of the student in B?
a) 72 b) 60 c) 48 d) 66 

31) In a committee there are 15 members . If two members whose ages are 45yr, and 55 are replaced by two new members, then average age of 15 members is increased by 2 years. what is average age(in yr) of the new members?
a) 59 b) 61 c)  65  d) 68 

32) 8 years ago, the ratio of ages of A and B was 9:10. The ratio of their ages 4 years from now will be 12 :13. what is the age(in yr) of C now, if his age is 6yr more than that of A ?
a) 56 b) 42  c) 50 d) 48 

33) A has thrice as much amount as that of B has 40% more amount than C. If the average of the amount of all three of them is 1320, then what amount (in Rs) A has ?
a) 2410  b) 2520  c) 2250 d) 3240 

34) In a class of 80 students, the ratio of the urban to the rural is priest 5:3. In  a test, the average score of the rural students is 40% more than that of the urban students. If the average score of all the students is 69, then what is the average score of the rural students ?
a) 80 b) 76 c) 92 d) 84

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