Q. Arun said, "This woman is the wife of the grandson of my mother". Who is Arun to the woman ?
1) Father
2) Grandfather
3) Husband
4) Father-in-law
Q. The mean of 99 items is 55, the value of 100th item is 99 more than the mean of 100 items. The value of 100th item is -
1) 150
2) 152
3) 155
4) 160
Q. Which of the following cannot be found from an ogive ?
1) Percentiles
2) Quartiles
3) Median
4) Mean
Q. From a series of 50 observations an observation 45 is dropped. Still the arithmetic mean of the series remains unchanged. The mean of the full series of 50 observations was -
1) 45
2) 50
3) 95
4) None of the above
Q. If the arithmetic mean of two numbers is 13 and their geometric mean is 12, then the numbers are -
1) 16 and 9
2) 13 and 7
3) 18 and 8
4) 20 and 6
Q. The arithmetic and harmonic means of a series are 12 and 3 respectively. The Geometric mean of this series is -
1) 4
2) 5
3) 6
4) 7
Q. The arithmetic mean of marks of 100 students is 50. It was found later that an observation '53' was wrongly read as '83'. The correct mean will be -
1) 49.5
2) 49.6
3) 49.7
4) 49.8
Q. The variance of first five natural numbers is -
1) 4
2) 3
3) 2
4) 1
Q. For a frequency distribution with unequal class intervals the histogram is drawn in such a way that frequencies are proportional to -
1) Area of rectangles
2) Height of rectangles
3) Width of rectangles
4) None of the above
Q. The mean, median and mode of the following data -
2, 4, 2, 5, 6, 2, 9, 6 are respectively -
1) 4.5, 5 and 2
2) 4.6, 5 and 3.5
3) 4.5, 5.5 and 2
4) 4.5, 4.5 and 2
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