Home
Class 12
MATHS
If ( x )1a n d( x )2 are the means of ...

If `( x )_1a n d( x )_2` are the means of two distributions such that `( x )_1<( x )_2 a n d x ` is the mean of the combined distribution then:- (a) `( x )_<( x )_1` (b) `( x )_>( x )_2` (c) ` x =(( x )_1+( x )_2)/2` (d) `( x )_1<( x )_<( x )_2`

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

If the mean of observations x_1,\ x_2,\ ....,\ x_n is x , then the mean of x_1+a ,\ x_2+a ,\ .... ,\ x_n+a is (a) a x (b) x -a (c) x +a (d) ( x )/a

If f(x)=x+tanx and g(x) is the inverse of f(x) , then differentiation of g(x) is (a) 1/(1+[g(x)-x]^2) (b) 1/(2-[g(x)+x]^2) (c)1/(2+[g(x)-x]^2) (d) none of these

If sectheta+tantheta=x , then sectheta= (a) (x^2+1)/x (b) (x^2+1)/(2x) (c) (x^2-1)/(2x) (d) (x^2-1)/x

If f(x) = (a-x^n)^(1/n) then fof(x) is (A) x (B) a-x (C) x^2 (D) -1/x^n

If sectheta+tantheta=x , then tantheta= (a) (x^2+1)/x (b) (x^2-1)/x (c) (x^2+1)/(2x) (d) (x^2-1)/(2x)

The mean deviation for n observations x_1, x_2, ......... , x_n from their mean X is given by (a) sum_(i=1)^n(x_i- X ) (b) 1/nsum_(i=1)^n(x_i- X ) (c) sum_(i=1)^n(x_i- X )^2 (d) 1/nsum_(i=1)^n(x_i- X )^2

If x^2+1/(x^2)=102 , then x-1/x=? (a)8 (b) 10 (c) 12 (d) 13

If barx is the mean of x_(1), x_(2), …………., x_(n) , then for a ne 0 , the mean of ax_(1), ax_(2),…….., ax_(n), x_(1)/a, x_(2)/a, ……….., x_(n)/a is

If y=(sin^(-1)x)^2,\ then (1-x^2)y_2 is equal to x y_1+2 (b) x y_1-2 (c) x y_1+2 (d) none of these

If f(x)={(x^2+1,x>=1),(3x-1,x 1) f(x) is (a) 2 (b) - 2 (c) 1 (d) - 1

RESONANCE DPP ENGLISH-JEE MAINS-All Questions
  1. If complex number (3+2i s in x)/(1-2i s in x) is purely imaginary then...

    Text Solution

    |

  2. Evaluate the following: (lim)(xvecpi/2)(sin x)/x

    Text Solution

    |

  3. If ( x )1a n d( x )2 are the means of two distributions such that ( ...

    Text Solution

    |

  4. Let f, g and h be the lengths of the perpendiculars from the circumcen...

    Text Solution

    |

  5. The probability of a shooter hitting a target is 3/4 . How many minimu...

    Text Solution

    |

  6. If the standard deviation of a variable xi ssigma , then standard devi...

    Text Solution

    |

  7. If z1a n dz2 are two nonzero complex numbers such that =|z1+z2|=|z1|+|...

    Text Solution

    |

  8. If the standard deviation of 0,1,2,3...9 is K, then the standard devia...

    Text Solution

    |

  9. Find the value of the constant k so that the given function is c...

    Text Solution

    |

  10. If z is a complex number such that |z|=4 and a r g(z)=(5pi)/6 , then z...

    Text Solution

    |

  11. Differentiate the following functions with respect to x a/(x^2)+b/(x^...

    Text Solution

    |

  12. If the system of equations x+a y=0,a z+y=0,a n da x+z=0 has infinite s...

    Text Solution

    |

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

    Text Solution

    |

  14. Evaluate the following: (lim)(x->0^+)xsin1//x

    Text Solution

    |

  15. If z=1+it h e nz^(10) reduces to: A purely imaginary number An imagina...

    Text Solution

    |

  16. Evaluate the following: lim(xrarrpi/2)(2sin x+3)/(3cos x+3)

    Text Solution

    |

  17. Let y be an implicit function of x defined by x^(2x)-2x^(x) cot y-1=0...

    Text Solution

    |

  18. In a triange, the line joining the circumcentre to the incentre is par...

    Text Solution

    |

  19. Find the limits (i) (lim)(x""->1)[(x^2+1)/(x+100)] (ii) (lim)(x""->2...

    Text Solution

    |

  20. If y^(2)=p(x) is a polynomial of degree 3, then 2(d)/(dx)(y^(3)(d^(2)y...

    Text Solution

    |