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The average of 4 consecutive odd numbers is 19. What is the smallest number?

A. 15
B. 17
C. 19
D. 21

The average of first 18 natural numbers is:

A. 8.5
B. 9
C. 9.5
D. 10

The average age of a group of 9 people is 36 years. If one person aged 45 years leaves, what is the new average?

A. 34
B. 35
C. 36
D. 37

The average of 5 numbers is 60. If one number is excluded, the average becomes 55. What is the excluded number?

A. 75
B. 80
C. 85
D. 90

The average marks of 20 students is 75. If 5 students score 90 each, what is the average of the remaining students?

A. 68
B. 70
C. 72
D. 73

The average of the first 30 odd numbers is:

A. 29
B. 30
C. 31
D. 32

The average of 7 numbers is 21. If one number is replaced by 35, the average becomes 23. What was the replaced number?

A. 21
B. 23
C. 25
D. 27

The average speed of a car for a journey is 80 km/h. If the distance is 240 km, the time taken is:

A. 2 hours
B. 2.5 hours
C. 3 hours
D. 3.5 hours

The average of first 16 natural numbers is:

A. 7.5
B. 8
C. 8.5
D. 9

The average of 10 observations is 50. If each observation is reduced by 10, the new average is:

A. 35
B. 38
C. 40
D. 42

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