Let m be the mean and σ be the standard deviation of the distribution
where ∑fi = 62. if [x] denotes the greatest integer ≤ x, then [μ2 + σ2] is equal
For the system of linear equations \(x+y+z=6\) \(\alpha x+\beta y+7 z=3\) \(x+2 y+3 z=14\). which of the following is NOT true ?
If the sum and product of four positive consecutive terms of a GP, are 126 and 1296, respectively, then the sum of common ratios of all such GPs is
Let ABCD be a quadrilateral. If E and F are the mid points of the diagonals AC and BD respectively and $ (\vec{AB}-\vec{BC})+(\vec{AD}-\vec{DC})=k \vec{FE} $, then k is equal to