Home
Class 12
MATHS
If variance of variables a ,2a ,2a ,3a ,...

If variance of variables `a ,2a ,2a ,3a ,3a ,3a ,dot,10 a` is 54 then value of `' a '` can be 3 (b) `-3` (c) 9 (d) 6

Promotional Banner

Topper's Solved these Questions

  • INVERSE TRIGONOMETRIC FUNCTIONS

    RESONANCE DPP ENGLISH|Exercise All Questions|15 Videos

  • MATRICES

    RESONANCE DPP ENGLISH|Exercise All Questions|7 Videos

Similar Questions

Explore conceptually related problems

A ratio equivalent to 2:3 is (a) 4:3 (b) 2:6 (c) 6:9 (d) 10:9

If 2a=3b=4c , then a : b : c= (a) 2:3:4 (b) 3:4:6 (c) 4:3:2 (d) 6:4:3

If 4:3=x^2: 12 , then the value of x\ (x >0)dot (a) 16 (b) 4 (c) 9 (d) 3

If (45)/(60) is equivalent to 3/x , then the value of x is (a) 3 (b) 6 (c) 4 (d) 9

If y=3^(x-1)+3^(-x-1) , then the least value of y is (a) 2 (b) 6 (c) 2//3 (d) 3//2

The fraction equivalent to 1 2/3 is (a) (10)/3 (b) 3/5 (c) (10)/6 (d) 6/(10)

If the mean and the variance of the numbers a, b, 8, 5 and 10 are 6 and 6.8 respectively, then the value of a^(3)+b^(3) is equal to

If a+b+c=6\ a n d\ a b+b c+c a=11 , find the value of a^3+b^3+c^3-3a b c

If a variable tangent to the curve x^2y=c^3 makes intercepts a , bonx-a n dy-a x e s , respectively, then the value of a^2b is 27c^3 (b) 4/(27)c^3 (c) (27)/4c^3 (d) 4/9c^3

If a variable tangent to the curve x^2y=c^3 makes intercepts a , bonx-a n dy-a x e s , respectively, then the value of a^2b is 27c^3 (b) 4/(27)c^3 (c) (27)/4c^3 (d) 4/9c^3

RESONANCE DPP ENGLISH-JEE MAINS-All Questions
  1. Two non-negative integers are chosen at random, then the probability ...

    Text Solution

    |

  2. Let a(n) be the nth term of an AP, if sum(r=1)^(100)a(2r)= alpha " and...

    Text Solution

    |

  3. If variance of variables a ,2a ,2a ,3a ,3a ,3a ,dot,10 a is 54 then va...

    Text Solution

    |

  4. If mean of squares of deviations of a set of n observations about -2a ...

    Text Solution

    |

  5. The angles of a triangle are in A.P. If the greatest angle is double ...

    Text Solution

    |

  6. The area (in sq. units) of the quadrilateral formed by the tangents ...

    Text Solution

    |

  7. A class consists of a number of boys whose ages are in A.P., the commo...

    Text Solution

    |

  8. If 7 times the 7th term of an A.P. is equal to 11 times its elevent...

    Text Solution

    |

  9. A bag contains 50 tickets numbered 1, 2, 3, .., 50 of which five are d...

    Text Solution

    |

  10. The minimum area of the triangle formed by the tangent to (x^2)/(a^2)+...

    Text Solution

    |

  11. int(x^2-1)/(xsqrt(1+x^4)) dx

    Text Solution

    |

  12. If the solution of the differential equation (dy)/(dx)=1/(xcosy+sin2y)...

    Text Solution

    |

  13. Two tangents to the parabola y^(2) = 8x meet the tangent at its vertex...

    Text Solution

    |

  14. The line y=m x bisects the area enclosed by the curve y=1+4x-x^2 and t...

    Text Solution

    |

  15. Consider 8 vertices of a regular octagon and its centre. If T denotes ...

    Text Solution

    |

  16. IfI(m , n)=int0^1x^(m-1)(1-x)^(n-1)dx ,(m , n in I ,m ,ngeq0),t h e n...

    Text Solution

    |

  17. There are 720 permutations of the digits 1, 2, 3, ,4 ,5, 6. Suppose th...

    Text Solution

    |

  18. 5 Indian and 5 Russian couples meet at a party and shake hands. The ...

    Text Solution

    |

  19. In a GP, the ratio of the sum of the first eleven terms of the sum of ...

    Text Solution

    |

  20. The number of terms of an A.P. is even; the sum of the odd terms is ...

    Text Solution

    |