Home
Class 12
MATHS
A binomial distribution has mean 5 and v...

A binomial distribution has mean 5 and variance 4. Find the number of trials.

Text Solution

Verified by Experts

Given np=5 and npq=4 `rArrq=4/5rArrp=1-q=1-4/5=1/5` Thus n=25
Promotional Banner

Topper's Solved these Questions

  • STRAIGHT LINES

    MBD PUBLICATION|Exercise QUESTION BANK|127 Videos

  • TRIGONOMETRIC FUNCTIONS

    MBD PUBLICATION|Exercise QUESTION BANK|267 Videos

Similar Questions

Explore conceptually related problems

A binomial distribution has mean 4 and variance 3. Write the number of trials.

A binomial distribution has mean 4 and variance 3 . Write the number of trials.

Find the Binomial distribution, whose mean is 5 and variance is 2.5.

In a Binomial distribution, the sum of its mean and the variance is 1.8 . Find the probability of two successes, if the event was conducted 5 times.

MBD PUBLICATION-THREE DIMENSIONAL GEOMETRY-QUESTION BANK
  1. If a die is rolled twice and X is the sum of scores obtained is greate...

    Text Solution

    |

  2. If X be a random variable which takes the values 0,1,2,…… with probabi...

    Text Solution

    |

  3. If {0.1,0.2,c,0.5} determines a probability distribution, find c.

    Text Solution

    |

  4. An unbiased die is thrown twice. What is the probability distribution ...

    Text Solution

    |

  5. A fair coin is tossed repeatedly. If tails appear on first four tosses...

    Text Solution

    |

  6. If two cards are drawn at random from a desk of cards, and X be the nu...

    Text Solution

    |

  7. What is the variance of X, given as follows : For the given data :

    Text Solution

    |

  8. A die is thrown 5 times. If getting an even number is a success, what ...

    Text Solution

    |

  9. The standard deviation of a binomial distribution (p+q)^16 is 2. Find ...

    Text Solution

    |

  10. The maximum value of variance in binomial distribution with parameter...

    Text Solution

    |

  11. A binomial distribution has mean 5 and variance 4. Find the number of ...

    Text Solution

    |

  12. A die is thrown 15 times. Getting a number greater than 5 is a success...

    Text Solution

    |

  13. The probability of an event happening in one trial of an ecperiment is...

    Text Solution

    |

  14. Two dice are tossed 6 times. Find the probability that 7 will show an ...

    Text Solution

    |

  15. If X-following a Binomial distribution with parameter n=6 and p, and i...

    Text Solution

    |

  16. A cartoon contains 20 bulbs, 5 of which are defective. Find the proba...

    Text Solution

    |

  17. An unbiased coin is tossed n times. Let X denote the number of times ...

    Text Solution

    |

  18. An experiment succeede twice as often as it fails. Find the probabilit...

    Text Solution

    |

  19. Find the expectation of the number of tails in 15 tosses of a coin.

    Text Solution

    |

  20. If the sum of the mean and the variance of a binomial distribution for...

    Text Solution

    |