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Which of the following are the properties of dispersion?

  1. It should be rigidly defined
  2. It should be based on all the observations
  3. It should be simple to understand and easy to calculate
  4. It should be capable of further algebraic treatments
    The degree of scatter or variation of the observations in a data about a central value is called

    If 1138=a+b2\sqrt{11-3\sqrt{8}}=a+b\sqrt{2}, then what is the value of (2a+3b)?

    When 5 children from class A join class B, the number of children in both classes is the same. If 25 children from B, join A, then the number of children in A becomes double the number of children in B. The ratio of the number of children in A to those in B is:

    If (10a3 + 4b3) : (11a3 - 15b3) = 7 : 5, then (3a + 5b) : (9a - 2b) =?

    If 27(x + y)3 - 8(x - y)3 = (x + 5y)(Ax2 + By2 + Cxy), then what is the value of (A + B - C)?

    Two positive numbers differ by 1280. When the greater number is divided by the smaller number, the quotient is 7 and the remainder is 50. The greater number is:

    If a + b + c = 6, a3 + b3 + c3 - 3 abc = 342, and a2 + b2 + c2 = 50, then what is the value of ab + bc + ca?

    If a and b are two positive real numbers such that a + b = 20 and ab = 4, then the value of a3 + b3 is:

    If a = 355, b = 356, c = 357, then find the value of a3 + b3 + c3 - 3abc.

    If a + b = 10 and 37\frac{3}{7} of ab = 9, then the value of a3 + b3 is:

    If xy = 16 and x2 + y2 = 32, then the value of (x + y) is:

    Find the factors of the expression 3x2 – 5x – 8.

    If x4+1x4=25716x^4+\frac{1}{x^4}=\frac{257}{16} then find 813(x3+1x3)\frac{8}{13}(x^3+\frac{1}{x^3}), where x>0.

    If a + b = 8 and a + a2 b + b + ab2 = 128 then the positive value of a3 + b3 is:

    If x2+1x2=38x^2+\frac{1}{x^2}=38 , then what is the value of x1x\left| {x - \frac{1}{x}} \right|

    If 2x + y = 6 and xy = 4, then find the value of 8x3 + y3 is:

    If a - b = 4 and a3 - b3 = 88, then find the value of a2 - b2.

    If x + y + z = 10, x3+y3+z3=75x^3 + y^3 + z^3 = 75 and xyz = 15, then find the value of x2+y2+z2xyyzzxx^2 + y^2 + z^2-xy-yz-zx

    If mode is 12A and mode is 15A find Median:
    Find the mode of 2,8,17,15,2,15,8,7,8
    If median and mean are 12 and 4 respectively, find the mode
    Which of the following is true?
    Which of the following is true
    Find the median of the given date : Mode = 24.5, Mean = 29.75

    Which of the following are the merits of mode

    1. Mode is affected by extreme values
    2. It can be determined for open end classes
    3. Mode is the only average that works with categorical data

      Find the mode

      Mark

      persons

      0 - 15

      2

      15 - 30

      8

      30 - 45

      12

      45 - 60

      4

      Find the mode:

      Mark

      Persons

      0-10

      4

      10-20

      6

      20-30

      16

      30-40

      8

      40-50

      6

      The sizes of 15 classes selected at random are: 40, 42, 48, 46, 42, 49, 43, 42, 38, 42. Find the mode

      If x=31x =\sqrt{3} - 1 and y=3+1y =\sqrt{3}+1 then (x4y4)(x+y)2\frac{(x^4-y^4)}{(x+y)^2} is equal to ?

      A=x1x+1A=\frac{x-1}{x+1}, then the value of A1AA-\frac{1}{A} is:

      If a3+b3+c33abc=126,a^3 + b^3 + c^3 - 3abc = 126, a + b + c = 6, then the value of (ab + bc + ca) is:

      If a+b=73a+b=\frac{7}{3} and a2+b2=319,a^2+b^2=\frac{31}{9}, find27(a3+b3)27(a^3+b^3)

      In the expansion of (2x+y)3(2xy)3(2x + y )^3-(2x - y)^3, the coefficient of x2yx^2y is:

      If a + b + c = 6, a2+b2+c2=30a^2 + b^2 + c^2 = 30 and a3+b3+c3=165,a^3 + b^3 + c^3 = 165, then the value of 4abc is:

      The difference between a number and one-third of that number is 228. What is 20% of that number?
      The sum of two numbers is 59 and their product is 840. Find the sum of their squares.

      If a + b + c = 7 and a3+b3+c33abc=175a^3 + b^3 + c^3-3abc = 175, then what is the value of (ab + bc + ca)?

      If 4a+15a=44a+\frac{1}{5a}=4 , then the value of 25a2+116a225a^2+\frac{1}{16a^2} is:

      If x+12x=3x+\frac{1}{2x}=3, find the value of 8x3+1x38x^3+\frac{1}{x^3}.

      If 2(a2+b2)=(a+b)22(a^2 + b^2) = (a + b)^2 then,

      If x : y = 2 : 3 then the value of 3x+2y9x+5y\frac{3x+2y}{9x+5y} will be

      2x - 3y is a factor of:
      If x + y = 15 and xy = 14, then the value of x – y is :
      If the sum of two numbers is 11 and the sum of their squares is 65, then the sum of their cubes will be:

      If x - 2y = 3 and xy = 5, find the value of x24y2x^2-4y^2

      If a + b = 11 and ab = 15, then a2+b2a^2 + b^2 is equal to:

      5, 7, 14 എന്നീ മൂന്നു സംഖ്യകൾ കൊണ്ടും, പൂർണമായും ഹരിക്കാൻ കഴിയുന്ന ഏറ്റവും ചെറിയ സംഖ്യ
      196 ചതുരശ്രമീറ്റർ പരപ്പളവ് (വിസ്തീർണ്ണം) ഉള്ള ഒരു സമചതുരത്തിന്റെ ഒരു വശത്തിന്റെ നീളമെത്ര ?
      ഒരാൾ ഒരു സാധനം 2,070 രൂപയ്ക്കു വിറ്റപ്പോൾ, 10% നഷ്ടമുണ്ടായി. 5% ലാഭം ലഭിക്കണമെങ്കിൽ ആ സാധനം എത്ര രൂപയ്ക്കു വിൽക്കണമായിരുന്നു ?