√5
√6
√7
√2
Correct answer is B
ClassInterval3−36−89−11x4710f222f−x81420|x−ˉx|2909|x−ˉx|218018
ˉx = ∑fx∑f
= 8+14+202+2+2
= 426
ˉx = 7
S.D = √∑f(x−ˉx)2∑f
= √18+0+186
= √366
= √6
Find, correct to two decimal places, the mean of 9, 13, 16, 17, 19, 23, 24. ...
calculate the surface area of a sphere of radius 7cm [Take π = 22/7] ...
Solve the equation 3 + 5x - 2x2 = 0...
A variable y is inversely proportional to x2, when y = 10, x = 2. What is y when x = 10?...
Given that x = 2 and y = -14, evaluate x2y−2xy5...
Two binary operations ∗ and ⊕ are defined as m ∗ n = mn - n - 1 and m \(\oplu...