Home
Class 12
MATHS
The probability that A speaks truth is ...

The probability that A speaks truth is `(4)/(5)`, while this probability for B is `(3)/(4)` , then the probability that they will contradict each when asked to speak on a fact, is -

A

`(1)/(5)`

B

`(7)/(20)`

C

`(3)/(20)`

D

`(2)/(5)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 6|80 Videos

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 8|80 Videos

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 3|80 Videos

  • MAXIMA AND MINIMA

    CHHAYA PUBLICATION|Exercise Sample Questions for Competitive Examination E|2 Videos

  • MCQ ZONE 3

    CHHAYA PUBLICATION|Exercise Question Paper 8|30 Videos

Similar Questions

Explore conceptually related problems

A speaks the truth 3 out of 4 times and B, 5 out of 6 times, what is the probability that they will contradict each other in stating the same fact ?

The probability that A hits a target is 1/3 and the probability that B hits it is 2/5 . What is the probability that the target will be hit if both A and B shoot at it?

Probability that A speaks truth is (4)/(5) . A coin is tossed. A reports that a head appears. The probability that actually there was head is

Three contractors A,B,C are bidding for the construction of a new office building. The probability that C will get the contract is half the B's probability of getting the same: again, the probability that B will get the contract is (5)/(7) th of A's probability of getting the same. Find the probability of each to get the contract. (Assume that one of the three contractors A,B,C will get the contract.)

Probability that husband is telling the truth is 0.8 , and the probability that wife is telling the truth is 0.6 .what is the probability that both will give contradict options narrating on the same since

The probability that a contractor will get a plumbing contract is (2)/(3) and the probability that he will not get an electric contract is (5)/(9) ,if the probability getting of at least one contract is (4)/(5) then what is the probability that he will get both the contract?

X speaks truth in 60% and Y in 50% of the cases. Find the probability that they contradict each other narrating the same incident.

Probability that A is telling the truth is given as 0.6 and probability that B is telling the truth is 0.7 while narrating on same question. Find the probability that both of them will give contradict options narrating on same scene

Find the probability of getting a digit 5 when a die is rolled.

CHHAYA PUBLICATION-MCQ ZONE -Question Paper 4
  1. The probability that in a family of 5 members, exactly 2 members have...

    Text Solution

    |

  2. A bag contains 5 white and 3 black balls and 4 balls are successively ...

    Text Solution

    |

  3. The probability that A speaks truth is (4)/(5), while this probabili...

    Text Solution

    |

  4. Three distinct numbers are selected from first 100 natural numbers. Th...

    Text Solution

    |

  5. In a bolt factory three machines A, B and C manufacture respectively 2...

    Text Solution

    |

  6. If x gt 0, then the value of sin[cot^(-1)cos(tan^(-1)x)] is equal to -

    Text Solution

    |

  7. If theta=sin^(-1)[sin(-600^(@))], then one of the possible values of t...

    Text Solution

    |

  8. If vectors vecalpha,vecbeta, vecgamma are such that vecalpha+vecbeta+...

    Text Solution

    |

  9. If hati+hatj+hatk, 2hati +5hatj, 3 hati+2hatj-3hatk and hati-6hatj-h...

    Text Solution

    |

  10. In the equation x^2-px+q=0 ratio of the roots are 2:3 ,then prove that...

    Text Solution

    |

  11. If the probability that a randomly selected bulb produced by a factory...

    Text Solution

    |

  12. If veca=hati+3hatj+hatk, vecb=2hati-hatj-hatk and vec c=m hati+7hatj+...

    Text Solution

    |

  13. The direction cosines of the line which is perpendicular to the lines ...

    Text Solution

    |

  14. The cosine of the angle between the lines vecr=3hati+2hatj-4hatk+lam...

    Text Solution

    |

  15. The coordinates of the point of intersection of the lines vecr=(hati+...

    Text Solution

    |

  16. The value of a for which the lines (x-5)/(5a+2)=(2-y)/(5)=(1-z)/(-1) ...

    Text Solution

    |

  17. The equation of the plane passing through the point (1, -3, -2) and pe...

    Text Solution

    |

  18. If a, b be two fixed positive integers such that f(a+x)=b+[b^(3)+1-3...

    Text Solution

    |

  19. The derivative of the function (sec x+tan x)/(sec x-tanx) is -

    Text Solution

    |

  20. If y=sin x^(@) and z=log(10)x, then the value of ( dy)/(dz) is -

    Text Solution

    |