Home
Class 12
MATHS
Let pmf of a random variable X is P(x)=(...

Let pmf of a random variable X is `P(x)=(3-x)/10`,x=-1,0,1,2.=0,otherwise.Then E(x) is…

A

1

B

2

C

0

D

`-1`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Matrices

    CHETANA PUBLICATION|Exercise EXERCISE|96 Videos

  • Trignometric Functions

    CHETANA PUBLICATION|Exercise EXERCISE|113 Videos

Similar Questions

Explore conceptually related problems

If the probability mass function of a discrete random variable X is P(x)=C/(x^3), x=1,2,3 =0, otherwise Then E(X)=

If the p.d.f of a random variable X is f(x)={(0.5x, 0lexle2), (0, "otherwise"):} Then the value of P(0.5 le X le 1.5) is

The p.d.f. of a random variable X is f(x)=2x, 0lexle1 =0 , otherwise Then the value of P(1/3 lt X lt 1/2) is

If the pdf of continuous random variable X is given as f(x)=x^2/3,-1 =0 ,otherwise. Then c.d.f.X is…….

The p.d.f. of a random variable X is f(x)=1/5, 0lexle5 =0 , otherwise Then the value of P(1 lt X lt 3) is

The p.d.f of a continous random variable X is f(x)=x/8, 0 lt x lt 4 =0 , otherwise Then the value of P(X gt 3) is

The p.d.f. of a continuous random variable X is f(x) = K/(sqrt(x)), 0 lt x lt 4 = 0 , otherwise Then P(X ge1) is equal to

If the p.d.f of a continuous random variable X is f(x)=kx^(2)(1-x), 0 lt x lt 1 = 0 otherwise Then the value of k is

CHETANA PUBLICATION-PROBABILITY DISTRIBUTIONS-EXERCISE
  1. The pmf for X=numbers of major defects in a randomly selected applianc...

    Text Solution

    |

  2. The time (in minutes)that a lab assistant to prepare the equipment for...

    Text Solution

    |

  3. P.d.f of a c.r.v X is f(x)=6x(1-x),for 0lexle1 and =0,otherwise(elsew...

    Text Solution

    |

  4. If the p.d.f of a r.v.x is f(x)=3(1-2x^2),for 0ltxlt1 and =0,other wi...

    Text Solution

    |

  5. If the p.d.f of a c.r.v. X is f(x)=x^2/18, for -3 < x < 3 and =0, oth...

    Text Solution

    |

  6. If p.m.f of a d.r.v.X is P(X=x)=(^5CX)/2^5, for x=0,1,2,3,4,5 and =0,...

    Text Solution

    |

  7. If X denotes the number obtained on the uppermost face when a fair di...

    Text Solution

    |

  8. If X is a r.v with pmf P(x)=kx,for x=1,2,3,=0,otherwise,then K=………..

    Text Solution

    |

  9. Let pmf of a random variable X is P(x)=(3-x)/10,x=-1,0,1,2.=0,otherwis...

    Text Solution

    |

  10. If the pdf of continuous random variable X is given as f(x)=x^2/3,-1 <...

    Text Solution

    |

  11. If the p.d.f of a c.r.v. X is f(x)=x^2/18, for -3 < x < 3 and =0, oth...

    Text Solution

    |

  12. Verify whether f(x)=sin x for 0lexlepi/2 is pdf of r.v.X.

    Text Solution

    |

  13. In a meeting.70% of the members favour and 30% oppose a certain propos...

    Text Solution

    |

  14. Find the probability distribution of number of tails in the simultaneo...

    Text Solution

    |

  15. If a r.v.X has p.d.f.,f(x)=c/x, For 1< x< 3 ,c>0, find c and E(X)

    Text Solution

    |

  16. The pdf of r.v.X is given by P(X=x)=^5Cx/2^5,for x=0,1,2,3,4,5=0,other...

    Text Solution

    |

  17. The pdf of r.v.X is given by f(x)=1/2a,for 0<x<2a, =0,otherwise, show ...

    Text Solution

    |

  18. Let X be the amount of time for which a book is taken out of library b...

    Text Solution

    |

  19. Let X be the amount of time for which a book is taken out of library b...

    Text Solution

    |

  20. A player tosses two coins He wins ₹10 if 2 heads appear,₹5 if 1 head a...

    Text Solution

    |