21 The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group? Mathematics Medium Full question → A 21 B 22 C 23 D 24
22 The total marks obtained by a student in Mathematics and Physics is 60 and his score in Chemistry is 20 marks more than that in Physics. Find the average marks scored in Mathematics and Chemistry together. Mathematics Medium Full question → A 40 B 30 C 25 D Data inadequate
23 Five years ago the average of the ages of A and B was 40 years and now the average of the ages of B and C is 48 years. What will be the age of the B ten years hence? Mathematics Medium Full question → A 55 years B 56 years C 58 years D Data inadequate
24 Aftab bought 65 books for Rs.1150 from one shop and 50 books for Rs.920 from another. What is the average price he paid per book ? Mathematics Medium Full question → A Rs.20 B Rs.18 C Rs.22 D Rs.16
25 The average height of 50 pupils in a class is 150 cm. Five of them whose height is 146 cm, leave the class and five others whose average height is 156 cm, join. The new average height of the pupils of the class (in cm) is __________ . Mathematics Medium Full question → A 149 B 151 C 152 D 153
26 In an exam, Amir scored 64 percent, Masood scored 36 percent and asif 44 percent. The maximum score awarded in the exam is 800. Find the average mark scored by all the three boys? Mathematics Medium Full question → A 384 B 364 C 324 D 404
27 The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam. Mathematics Medium Full question → A 20 B 15 C 25 D 35
28 A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If the average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what are the marks in Physics? Mathematics Medium Full question → A 60 B 64 C 72 D 80
29 The average of four positive integers is 69. The highest integer is 93 and the least integer is 39. The difference between the remaining two integers is 28. Which of the following integers is the higher of the remaining two integers? Mathematics Medium Full question → A 58 B 86 C 49 D None of these
30 The present average age of a family of five members is 26 years. If the present age of the youngest member in the family is ten years, then what was the average age of the family at the time of the birth of the youngest member ? (Assume no death occurred in the family since the birth of the youngest). Mathematics Medium Full question → A 18 years B 14 years C 20 years D 16 years
31 The total marks obtained by a student in Physics, Chemistry and Mathematics is 150 more than the marks obtained by him in Physics. What is the average mark obtained by him in Chemistry and Mathematics? Mathematics Medium Full question → A 75 B 150 C 50 D None of these
32 The average height of 35 boys in a class was calculated as 180cm. It has later found that the height of one of the boys in the class was wrongly written as 166 cm whereas his actual height was 106 cm. Find the actual average height of the boys in the class (Round off your answer to two decimal places)? Mathematics Medium Full question → A 179.29 cm B 178.29 cm C 179.38 cm D 178.39 cm
33 The average age of seven persons sitting in a row facing east is 28 years. If the average age of the first three persons is 21 years and the average age of the last three persons is 34 years, then find the age of the person sitting in the middle of the row? Mathematics Medium Full question → A 30 Years B 31 years C 26 years D 33 years
34 The average runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 13 runs. Find his average in all the 30 matches? Mathematics Medium Full question → A 31 B 29 C 28 D 30
35 The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally? Mathematics Medium Full question → A 4 B 5 C 6 D 7
36 A salt manufacturing company produced a total of 5000 tonnes of salt in January of a particular year. Starting from February its production increased by 100 tonnes every month over the previous months until the end of the year. Find its average monthly production for that year? Mathematics Medium Full question → A 6060 B 7070 C 5550 D 4440
37 The average amount with a group of seven numbers is Rs. 20. If the newly joined member has Rs. 50 with him, what was the average amount with the group before his joining the group? Mathematics Medium Full question → A Rs. 25 B Rs. 18 C Rs. 15 D Rs. 22
38 The sum of five numbers is 655. The average of the first two numbers is 85 and the third number is 125. Find the average of the two numbers? Mathematics Medium Full question → A 180 B 170 C 190 D 175
39 Find the average of the series : 312, 162, 132, 142 and 122? Mathematics Medium Full question → A 194 B 174 C 162 D 186
40 The average age of a group of 10 persons was decreased by 3 years when one person, whose age was 42 years, was replaced by a new person. Find the age of the new person? Mathematics Medium Full question → A 22 B 24 C 12 D 8