Home
Class 12
MATHS
If X~B(n,p),mu=20,sigma^(2)=10, then fin...

If `X~B(n,p),mu=20,sigma^(2)=10`, then find n and p.

Text Solution

Verified by Experts

The correct Answer is:
`n=40`
Promotional Banner

Topper's Solved these Questions

  • RANDOM VARIABLE

    AAKASH SERIES|Exercise EXERCISE-3.1 (LONG ANSWER QUESTIONS)|9 Videos

  • RANDOM VARIABLE

    AAKASH SERIES|Exercise EXERCISE-3.2 (VERY SHORT ANSWER QUESTIONS)|16 Videos

  • QUADRATIC EQUATIONS & EXPRESSIONS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|88 Videos

  • RANDOM VARIABLES

    AAKASH SERIES|Exercise Exercise 4.4|9 Videos

Similar Questions

Explore conceptually related problems

If for a Binomial distribution, mu=10 and sigma^(2)=5 , then find P(X gt 6) .

If ""^(n)P_(4)=1680, find n.

If ""^(n)P_(4)=210 , find n.

If ""^(n)P_(3)=1320 , find n.

n^(th) term of an A.P. is a_(n) . If a_(1)+a_(2)+a_(3) = 102 and a_(1) = 15 , then find a_(10) .

X~B(n,p) and mean and variance of X are (15)/(2) and (15)/(4) . Find n and p.

In an A.P., if a = 1 , a_(n) = 20 and S_(n) = 399 , then n = ……..

If ""^nP_5:""^(n-1)P_5=3:2 then find n.

AAKASH SERIES-RANDOM VARIABLE -PRACTICE EXERCISE
  1. If X~B(n,p),mu=20,sigma^(2)=10, then find n and p.

    Text Solution

    |

  2. A random variable X ahs the following distribution {:(x,1,2,3,4),(P...

    Text Solution

    |

  3. X is a random variable with distribution given below {:(x:,0,1,2,3),...

    Text Solution

    |

  4. Given below is the distribution of a random variable X If alpha ...

    Text Solution

    |

  5. A random variable X has the following distribution . The mean and...

    Text Solution

    |

  6. In a probability distribution of a random variable X , the sum of prob...

    Text Solution

    |

  7. A random variable X has the following distribution . The value of...

    Text Solution

    |

  8. If X is the sum of the number when two dice are rolled , then mean var...

    Text Solution

    |

  9. A random variable X has its range {0,1,2,3,………}. If P(X=r)=(c(r+1))/(2...

    Text Solution

    |

  10. If it rains a dealer in rain coats can earn Rs . 500 Rs a day . If it ...

    Text Solution

    |

  11. A box contains 6 tickets. Two of the tickets carry a price of Rs. 5//-...

    Text Solution

    |

  12. For a dealer in a consignment of umbrellas , the probabilty of getting...

    Text Solution

    |

  13. In a binomial distribution n=12, p=1//3. Then mean and variance are

    Text Solution

    |

  14. In a binomial distribution, mean is 5 and the variance is 4 . The numb...

    Text Solution

    |

  15. If the mean and variance of a binomial variate X are (4)/(3),(8)/(9) ...

    Text Solution

    |

  16. If for a binomial distribution the mean is 6 and the standdard deviati...

    Text Solution

    |

  17. A box contains 4 red and 8 white balls . If 4 balls are drawn one by o...

    Text Solution

    |

  18. Probability of happening of an event in an experiment is 0.4 . The pro...

    Text Solution

    |

  19. In a binomial distribution the mean is 12 and the standard deviation i...

    Text Solution

    |

  20. A fair coin is tossed a fixed number times . If the probability of get...

    Text Solution

    |

  21. A coin is biased so that the probability of falling head when tossed i...

    Text Solution

    |