Mathematics  Average  Set 2
1. A company produces an average of 4000 items per month for the first 3 months. How much items, it must produce on an average per month over the next 9 months to average 4375 items per month over the whole year ?
(a) 4500 (b) 4600 (c) 4680 (d) 4710 2. The average of the largest and the smallest 3 digit numbers formed by 0, 2 and 4 would be (SSC CGL 2014 Teir II held on 12042015) (a) 213 (b) 303 (c) 312 (d) 222 3. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of all the students is (a) 54.68 (b) 53.33 (c) 55 (d) None of these 4. Average age of 6 sons of a family is 8 years. Average age of sons together with their parents is 22 years. If the father is older than the mother by 8 years, the age of the mother (in years) is : (a) 44 (b) 52 (c) 60 (d) 68 5. Out of the three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 56, then the difference of the first and third number is : (a) 12 (b) 20 (c) 24 (d) 48 6. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is : (a) 17 kg (b) 20 kg (c) 26 kg (d) 31 kg 7. The average of runs scored b a player in 10 innings is 50. How many runs should he score in the 11th innings so that his average in increased by 2 runs ? (a) 80 runs (b) 72 runs (c) 60 runs (d) 54 runs 8. The average of a nonzero number and its square is 6 times the number. The number is : (a) 9 (b) 11 (c) 17 (d) 29 9. The average temperature for Monday, Tuesday, Wednesday and Thursday was 48°. The average temperature for Tuesday, Wednesday, Thursday and Friday was 52°. If the temperature on Monday was 42°, then the temperature on Friday was (in degrees) (SSC CGL 2016 Tier I held on 04092016) (a) 58 (b) 56 (c) 52 (d) 50 10. The present average age of a family of four members is 36 years. If the present age of the youngest member of the family be 12 years, the average age of the family just before the birth of the youngest member was : (a) 48 years (b) 40 years (c) 32 years (d) 24 years 11. The average of all the odd integers between 2 and 22 is : (SSC CHSL Exam 2015)
(a) 14 (b) 12 (c) 13 (d) 11 12. The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is (SSC CGL 2014 Teir II held on 12042015) (a) 128 kg (b) 97.45 kg (c) 128.75 kg (d) 131 kg 13. The average expenditure of a man for the first five months of a year is Rs. 5000/ and for the next seven months it is Rs. 5400/. He saves Rs. 2300/ during the year. His average monthly income is (a) Rs. 5500/ (b) Rs. 5425/ (c) Rs. 5446/ (d) Rs. 5600/ 14. The average of 100 numbers is 44. The average of these 100 numbers and 4 other new numbers together is 50. The average of the 4 new numbers will be (a) 800 (b) 200 (c) 176 (d) 24 15. The average weight of a class of 15 boys and 10 girls is 38.4 kg. If the average weight of the boys is 40 kg, then what is the average weight of the girls ? (CDS I 2013) (a) 36.5 kg (b) 35 kg (c) 36 kg (d) 35.6 kg ANSWERS

