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The average of 7 consecutive numbers is 20. The largest of these numbers is :
Option 1: 21
Option 2: 22
Option 3: 23
Option 4: 24
Option 5:
A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was :
Option 1: 665
Option 2: 657
Option 3: 658
Option 4: 678
Option 5:
In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?
Option 1: 6
Option 2: 12
Option 3: 24
Option 4: 18
Option 5:
The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is :
Option 1: 20
Option 2: 21
Option 3: 23
Option 4: 24
Option 5:
The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers ?
Option 1: 3.6
Option 2: 4.6
Option 3: 6.5
Option 4: 7.3
Option 5:
A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. His average speed for the whole journey in km/hr is :
Option 1: 35
Option 2: 36
Option 3: 37.5
Option 4: 38.2
Option 5:
The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is :
Option 1: 30
Option 2: 40
Option 3: 50
Option 4: 60
Option 5:
The average of 11 numbers is 10.9. If the average of tbe first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :
Option 1: 10.5
Option 2: 11.5
Option 3: 12.5
Option 4: 13.5
Option 5:
If the mean of a, b, c is M and ab + bc + ca = 0, then the mean of a^2, b^2, c^2 is :
Option 1: M
Option 2: 3 M^2
Option 3: 2 (M/3)
Option 4: M^2
Option 5:
A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?
Option 1: 6
Option 2: 7
Option 3: 8
Option 4: 9
Option 5:
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