Question 1: If the mean of numbers 28, x, 42, 78 and 104 is 62, then what is the mean of 128, 255, 511, 1023 and x? Answer & Explanation »
Question 2: The arithmetic mean of the 5 consecutive integers starting with 's' is 'a'. What is the arithmetic mean of 9 consecutive integers that start with s + 2? Answer & Explanation »
Question 3: The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach was added. If average weight of the group after including the weight of the football coach is 31kgs, what is the weight of their football coach in kgs? Answer & Explanation »
Question 4: The average wages of a worker during a fortnight comprising 15 consecutive working days was $ 90 per day. During the first 7 days, his average wages was $ 87/day and the average wages during the last 7 days was $ 92 /day. What was his wage on the 8th day? Answer & Explanation »
Question 5: The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers? Answer & Explanation »
Question 6: The average age of a group of 10 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the two new students who joined the group? Answer & Explanation »
Question 7: If m, s are the average and standard deviation of integers a, b, c, and d, is s > 0?
(1) m > a
(2) a + b + c + d = 0 Answer & Explanation »
Question 8: Positive integers from 1 to 45, inclusive are placed in 5 groups of 9 each. What is the highest possible average of the medians of these 5 groups? Answer & Explanation »
Question 9: If the average of 5 positive integers is 40 and the difference between the largest and the smallest of these 5 numbers is 10, what is the maximum value possible for the largest of these 5 integers? Answer & Explanation »
Question 10: An analysis of the monthly incentives received by 5 salesmen : The mean and median of the incentives is $7000. The only mode among the observations is $12,000. Incentives paid to each salesman were in full thousands. What is the difference between the highest and the lowest incentive received by the 5 salesmen in the month? Answer & Explanation »
eBook on Descriptive Statistics
This ebook with about 110 questions in over 200 pages covers all major concepts in Descriptive Statistics (Mean, Median, Range, and Deviation). Includes typical GMAT type questions in both Problem Solving and Data Sufficiency formats.
These concepts are explained with 35 solved examples and illustrative examples. In addition, the eBook also includes 40+ exercise problems in problem solving and over 25 exercise questions in Data Sufficiency.
GMAT™ and GMAC™ are registered trademarks of the Graduate Management Admission Council™. The Graduate Management Admission Council™ does not endorse, nor is it affiliated in any way with the owner or any content of this web site.
Topicwise List of Questions
This ebook with about 110 questions in over 200 pages covers all major concepts in Descriptive Statistics (Mean, Median, Range, and Deviation). Includes typical GMAT type questions in both Problem Solving and Data Sufficiency formats.
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