Home
Class 12
MATHS
Let the p.m.f. of a random variable X be...

Let the p.m.f. of a random variable X be -
` P(x) = (3 -x)/10 " for " x = - 1, 0, 1, 2`
= 0 otherwise
Then E(X) is ………… .

A

1

B

2

C

0

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • QUESTION BANK 2021

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise BINOMIAL DISTRIBUTION|20 Videos

  • QUESTION BANK 2021

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise DIFFERENTIAL EQUATIONS|38 Videos

  • PROBABILITY DISTRIBUTION

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise MULTIPLE CHOICE QUESTIONS|9 Videos

  • THREE DIMENSIONAL GEOMETRY

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise MULTIPLE CHOICE QUESTIONS|8 Videos

Similar Questions

Explore conceptually related problems

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

The p.d.f of a continuous random variable X is f(x) = (x^(2))/(3), - 1 lt x lt 2 0 = otherwise Then the c.d.f of X is

If X is the a random variable with probability mass function P(x) = kx , for x = 1,2,3 = 0 , otherwise then k = ……..

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.m.f of a d.r.v. X is P(X=x) = {{:((x)/(n(n+1))", for","x = 0,1,2,3,...,n"),(" 0,"," otherwise"):} then E(X) = ……

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

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 random variable X is given by f(x) = 3(1-2x^(2)), 0 lt x lt 1 = 0 , otherwise Find P((1)/(4)lt X lt (1)/(3))

Let the p.m.f. ( probability mass function ) of random variable x be P(x) = (4/x)(5/9)^(x)(4/x)^(4-x), x = 0, 1, 2, 3, 4 = 0 , otherwise Find E(x) and Var.(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

NAVNEET PUBLICATION - MAHARASHTRA BOARD-QUESTION BANK 2021-PROBABILITY DISTIBUTIONS
  1. Let the p.m.f. of a random variable X be - P(x) = (3 -x)/10 " for ...

    Text Solution

    |

  2. If the probability that a bomb will hit a target is 60% and if 10 bomb...

    Text Solution

    |

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

    Text Solution

    |

  4. A random variable X has the following probability distribution Th...

    Text Solution

    |

  5. For the random variable X , if V(X) = 4 , E(X) = 3 , then E(X^(2)) is...

    Text Solution

    |

  6. A random variable X takes the values 0,1,2,3,..., with prbability PX(=...

    Text Solution

    |

  7. The p.m.f of a d.r.v. X is P(X = x) = {{:(((. ^(5)C(x)))/(2^(5))", fo...

    Text Solution

    |

  8. If the p.m.f of a d.r.v. X is P(X=x) = {{:((x)/(n(n+1))", for","x = 0,...

    Text Solution

    |

  9. The p.m.f. of a r.v. X is P(x)={{:((c)/(x^(3))","x=1","2","3),(0", oth...

    Text Solution

    |

  10. If a d.r.v. X has the following probability distribution : then P...

    Text Solution

    |

  11. If a d.r.v. X has the following probability distribution: then k ...

    Text Solution

    |

  12. Let X represent the difference between number of heads and number of t...

    Text Solution

    |

  13. An urn contains 5 red and 2 black balls. Two balls are drawn at random...

    Text Solution

    |

  14. State which of the following are not probability mass function of rand...

    Text Solution

    |

  15. State which of the following are not probability mass function of rand...

    Text Solution

    |

  16. State which of the following are not probability mass function of rand...

    Text Solution

    |

  17. State which of the following are not probability mass function of rand...

    Text Solution

    |

  18. Find mean for the following probability distribution

    Text Solution

    |

  19. State whether the following is not the probability mass function of ra...

    Text Solution

    |

  20. Find the expected value and variance of r.v. X whose p.m.f. is given b...

    Text Solution

    |