Home
Class 12
MATHS
For any two events A and B associated to...

For any two events A and B associated to a random experiment, prove that: `P(A)=P(AnnB)+P(AnnbarB)` `P(B)=P(AnnB)+P( barAnnB)` `P(AuuB)=P(AnnB)+P(AnnbarB)+P(barAnnB)`

Text Solution

Verified by Experts

We know that,
`P(AuuB)=P(A) + P(B) - P(A nnB)`
Putting all the values, we get
`P(AuuB)=P(AnnB)+P(AnnbarB)+ P(AnnB)+P( barAnnB) - P(A nnB)`
`P(AuuB)=P(AnnbarB)+ P(AnnB)+( barAnnB) `
Hence Proved.
Promotional Banner

Topper's Solved these Questions

  • MEAN VALUE THEOREMS

    RD SHARMA|Exercise Solved Examples And Exercises|110 Videos
  • RELATIONS

    RD SHARMA|Exercise Solved Examples And Exercises|197 Videos

Similar Questions

Explore conceptually related problems

Let A; B be two events associated to a random experiment. (i)P(barAnnB)=P(B)-P(AnnB) (ii) P(AnnbarB)=P(A)-P(AnnB) (iii) P(barAnnB)uuP(AnnbarB)=P(A)+P(B)-2P(AnnB)

If A and B are two events associated with a random experiment; then P(A uu B)=P(A)+P(B)-P(A nn B)

If A and B are independent events associated with a random experiment; then P(AnB)=P(A)P(B)

If A and B are two events associated with a random experiment; then P((bar(A))/(B))=1-P((A)/(B))

If A;B and C are three events associated with a random experiments then P(A uu B uu C)=P(A)+P(B)+P(C)-P(A nn B)-P(B nn C)-P(C nn A

Let P(E) denote the probability of occurrence of event E. If A and B are two events associated with an experiment such that |[P(A)-1,P(B),-P(A nn B)],[P(B),-P(A nn B),P(A)-1],[-P(A nn B),P(A)-1,P(B)]|=0 then (A) P(A uu B)=1 (B) P(A/B)=(P(A)+P(B)-1)/(P(B)) (C) if A sub B then P(B)=P(A uu B) (D) if A sub B then P(A)=1

If A and B are two events of a random experiment such that P(A)=0.6,P(B)=0.3 and P(A/B)=0.5 then P(bar(B)/bar(A)) =

If A and B are two events associated with a random experiment such that P(A)=0.3,P(B)=0.2" and "P(AcapB)=0.1, then the value of P(A∪B) is ….

If A and B are two events associated with a random experiment such that P(A) = 0.25, P(B) 0.4 and P(A or B) = 0.5, find the values of (i) P(A and B) (ii) P(A and bar(B))

Let A and B be two events associated with a random experiment and S be the sample space.If C is an event such that P(C)!=0 then P((AUB)/(C))=P((A)/(C))+P((B)/(C))-P((AnB)/(C))

RD SHARMA-PROBABILITY-Solved Examples And Exercises
  1. A shopkeeper sells three types of seeds A1, A2a n dA3 They are sold a...

    Text Solution

    |

  2. For any two events A and B associated to a random experiment, P(A)=0.5...

    Text Solution

    |

  3. For any two events A and B associated to a random experiment, prove ...

    Text Solution

    |

  4. The probability of simultaneous occurrence of at least one of two e...

    Text Solution

    |

  5. A die is rolled thrice, find the probability of getting a larger nu...

    Text Solution

    |

  6. If the letters of the word ATTRACTION are written down at random, f...

    Text Solution

    |

  7. If each element of a second order determinant is either zero or one, ...

    Text Solution

    |

  8. Each coefficient in the equation a x^2+b x+c=0 is determined by throwi...

    Text Solution

    |

  9. Find the number of ways in which the birthday of six different persons...

    Text Solution

    |

  10. A fair dice is rolled. Consider the following events: A={1,2,5},B={2,3...

    Text Solution

    |

  11. A coin is tossed three times. Find P(E//F) in each of the following: (...

    Text Solution

    |

  12. A bag contains 6 red and 5 blue balls and another bag contains 5 red ...

    Text Solution

    |

  13. There are two bags, one of which contains 3 black and 4 white balls, ...

    Text Solution

    |

  14. One bag contains 4 white and 5 black balls. Another bag contains 6 w...

    Text Solution

    |

  15. There are two bags. The first bag contains 5 white and 3 black balls ...

    Text Solution

    |

  16. Find the probability of drawing a one-rupee coin from a purse with two...

    Text Solution

    |

  17. A probability of student A passing an examination is 2/9 and of studen...

    Text Solution

    |

  18. X is taking up subjects Mathematics, Physics and Chemistry in the e...

    Text Solution

    |

  19. A and B throw alternately a pair of dice. A wins if he throws 6 before...

    Text Solution

    |

  20. Three persons A, B, C throw a die in succession till one gets a six ...

    Text Solution

    |