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Question 1
If the average marks of first 5/7th of the students of a class is 5/7th of the average of the entire class, then what is the average marks of the remaining students?
Question 2
The average of 20 numbers is 100. If the averages of first 10 and last 9 are 95 and 104 respectively, then what is the eleventh term?
Question 3
The average temperature for Monday, Tuesday, Wednesday and Thursday was 48° . The average temperature for Tuesday, Wednesday, Thursday and Friday was 52°, If the temperature on Monday was 42°, then the temperature on Friday was (in degrees)
Question 4
Out of 24 students of a class 6 are 1 m 15 cm in height, 8 are 1 m 5 cm and the rest are 1 m 11 cm. What is the average height of the students?
Question 5
Find the average of the squares of first ten natural numbers.
Question 6
The average of five numbers is 34.4. The average of the first and the second number is 46.5. The average of the fourth and the fifth number is 18. What is the third number?
Question 7
Of the three numbers, second is twice the first and also thrice the third. If the average of three numbers is 66, the largest number is
Question 8
A man spends in 8 months as much as he earns in 6 months. He saves Rs. 6000 in a year. His average monthly income is?
Question 9
A number a, equals 90% of the average of 8.2, 11, 16.8 and b. If the average of ‘a’ and ‘b’ is 18.75, then the value of b is?
Question 10
Two experiments are conducted with six observations each. The average readings of first experiment is 52.5 and of second experiment is 45.5. But, By mistake, during calculating average, one reading of first experiment was exchanged with one reading of second experiment. The swapped observation of 2nd experiment is ¾th of that of the 1st experiment and correct average of both experiments are equal, Then, find the correct averages.
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Jul 12SSC & Railway
