2
4
12
17
Correct answer is A
| x | x - x | (x - x)\(^2\) |
|
7 8 9 10 11 12 13
|
-3 -2 -1 0 1 2 3
|
9 4 1 1 0 4 9 -------------- 28
|
S.D = \(\frac{\sqrt\sum (x - x)^2}{N} = \frac{\sum d^2}{N} = \frac{\sqrt{28}}{7}\)
= \(\sqrt{4}\)
= 2
Find the eleventh term of the progression 4, 8, 16........
U is inversely proportional to the cube of V and U = 81 when V = 2. Find U when V = 3 ...
List all integers satisfying the inequality in -2 < 2x-6 < 4 ...
Evaluate the integral \(\int^{\frac{\pi}{4}}_{\frac{\pi}{12}} 2 \cos 2x \mathrm {d} x\)...
Find the area bounded by the curve y = 3x\(^2\) - 2x + 1, the ordinates x = 1 and x = 3 and the...
The variance of x, 2x, 3x, 4x and 5x is ...
If Q is\( \left[ \begin{array}{cc} 9 & -2 \\ -7 & 4 \\ \end{array} \right]\) , then |Q| i...
Simplify \(\frac{(1.25 \times 10^{-4}) \times (2.0 \times 10^{-1})}{(6.25 \times 10^5)}\)...