(1). In an examination, the average of marks was found to be 50. For deducting marks for computational errors, the marks of 100 candidates had to be changed from 90 to 60 each and so the average of marks came down to 45. The total number of candidates, who appeared at examination, was

• (a). 600
• (b). 700
• (c). 170
• (d). 720
• (e). None of these

(2). There are 50 students in a class. Their average weighted is 45 kg. When one student leaves the class the average weight reduced by 100 grams. What is the weight of the student who left the class?

• (a). 49
• (b). 49.9
• (c). 51.8
• (d). 55
• (e). None of these

(3). The average weight of a group of 20 boys was calculated to be 89.4 kg, and it was later discovered that one weight was misread as 78 kg instead of 87 kg. The correct average weight is.

• (a). 88.95
• (b). 89.25
• (c). 89.55
• (d). 89.85
• (e). None of these

(4). Out of three numbers, the first is twice the second and is half of the third. If the average of three numbers is 56. Find the largest number?

• (a). 48
• (b). 24
• (c). 96
• (d). 75
• (e). None of these

(5). The average of three numbers is 42. The first is twice the second and the second is twice the third. What is the difference between the largest and the smallest numbers?

• (a). 18
• (b). 72
• (c). 54
• (d). 26
• (e). None of these

(6). The average height of 30 girls out of a class of 40 is 160 cms and that of the remaining girls is 156 cms. What is the average height of the whole class?

• (a). 138
• (b). 213
• (c). 132
• (d). 159
• (e). None of these

(7). The average of marks obtained by 120 candidates was 35. If the average marks of passed candidates was 39 and that of failed candidates was 15. Find the number of candidates who passed the examination?

• (a). 92
• (b). 100
• (c). 96
• (d). 75
• (e). None of these

(8). Two brothers A and B leaves from house for the school. A covers the distance at the speed of 10 kmph while B at 8 Kmph. Find their average speed?

• (a). 8.89
• (b). 8.8
• (c). 8
• (d). 7.5
• (e). None of these

(9). The average age of 8 men is increased by 4 years when one of them whose age is 30 years is replaced by a new man. Find the age of new man?

• (a). 38
• (b). 62
• (c). 68
• (d). 46
• (e). None of these

• (a). 48
• (b). 24
• (c). 96
• (d). 55
• (e). None of these