1

AIEEE 2009

MCQ (Single Correct Answer)

+4

-1

If the mean deviation of number 1, 1 + d, 1 + 2d,........, 1 + 100d from their mean is 255, then the d is
equal to

2

AIEEE 2009

MCQ (Single Correct Answer)

+4

-1

**Statement - 1 :**The variance of first n even natural numbers is $${{{n^2} - 1} \over 4}$$

**Statement - 2 :**The sum of first n natural numbers is $${{n\left( {n + 1} \right)} \over 2}$$ and the sum of squares of first n natural numbers is $${{n\left( {n + 1} \right)\left( {2n + 1} \right)} \over 6}$$

3

AIEEE 2008

MCQ (Single Correct Answer)

+4

-1

The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following
gives possible values of a and b?

4

AIEEE 2007

MCQ (Single Correct Answer)

+4

-1

The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys
and girls combined is 50. The percentage of boys in the class is

Questions Asked from Statistics (MCQ (Single Correct Answer))

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