1) The average weight of 3 person P, Q, R is 84 kg. Another person who is S joins the group and now the present average of the group becomes 80 kg. If another person T, whose weight is 3 kg more than that of S, replaces P then the average weight of Q, R, S, and T becomes 78 kg. Find the weight of P. a) 70 kg b) 79 kg c) 78 kg d) 72 kg e) 81 kg f) 43 kg 2) Three years ago, the average of A, B, and C was 27 years and that of B and C 5 years ago was 20 years. A’s present age is a) 35 years b) 30 years c) 48 years d) 40 years e) 39 years f) 41 years 3) The average age of a family of 6 members is 22 years. If the age of the youngest member be 7 years, what was the average age of the family at the birth of the youngest member? a) 18 b) 15 c) 12 d) 21 e) 19 f) 20 4) The average of ten numbers is 7. If each number is multiplied by 12, then the average of the remaining numbers will be a) 7 b) 9 c) 84 d) 87 e) 8 f) 36 5) Average marks obtained by Raju in 3 papers is 52 and in the fourth paper, he scored 60 marks. Find the new average of marks scored by Raju. a) 55 b) 52 c) 53.5 d) 54.5 e) 54 f) 51 6) The average of 50 members is 38. If the two numbers, 45 and 55 are discarded the average of the remaining numbers will become a) 36 b) 38 c) 36.5 d) 37 e) 39 f) 37.5 7) If we choose four numbers, the average of the first three will be 16 and that of last three is 15. If the last number is 18, the first number will be a) 20 b) 21 c) 23 d) 25 e) 30 f) 19

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