Multiple Choice QuestionsThe average (arithmetic mean) of 330, 360 and 390 is
327 + 357 + 387
360
329+359+389
329+359+389
The average of the largest and smallest 3 digit numbers formed by 0, 2 and 4 would be
312
213
222
222
The frequency distribution data is given below. If the average age is 17 years, the value of m isÂ
Age (in m years) : Â 8 Â Â Â 20 Â Â Â 26 Â Â Â Â 29
Number of people:  3     2     m     1
1
2
3
3
The average monthly expenditure of a family for the first four months is ₹ 2570, for the next three months ₹ 2490 and for the last five months ₹ 3030. If the family saves ₹ 5320 during the whole year, the average monthly income of the family during the year is
₹ 3000
₹ 3185
₹ 3200
₹ 3200
B.
₹ 3185
Total annual expenditure of the family = Rs. (4 x 2570 + 3 x 2490 + 5 x 3030)
= Rs. (10280 + 7470 + 15150) = Rs. 32900
Total income  = Rs. (32900 + 5320)
          = Rs. 38220
∴  Required average monthly income = 
The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed?
5
35
112
112
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. The difference between the ages of the replaced and the new members is
2 years
4 years
8 years
8 years
A man spends ₹ 1800 monthly on an average for the first four months and ₹ 2000 monthly for the next eight months and saves ₹ 5600 a year. His average monthly income is
₹ 2000
₹ 2200
₹ 2400
₹ 2400
The arithmetic mean of the following numbers
1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7, 7, 7, 7, 7, is
4
5
14
14
The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12. find the 4th number.
16
20
20
If the average of 6 consecutive even numbers is 25, the difference between the largest and the smallest number is
8
10
12
12
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