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)`. The probability that they contradict each other when asked to speak on a fact is

A

`3/20`

B

`1/5`

C

`7/20`

D

`4/5`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Recent IIT questions

    A DAS GUPTA|Exercise Exercise|20 Videos

  • Some New Pattern Problems

    A DAS GUPTA|Exercise Exercise|137 Videos

Similar Questions

Explore conceptually related problems

The probability that A speaks truth is 5/6 , while this probability for B is 4/5 .The probability that they contradict each other when asked to speak on a fact is ___

The probability that A speaks truth is (4)/(5) while this probability for B is (3)/(4) .The probability that they contradict (A) (4)/(5) (B) (1)/(5) (C) (7)/(20) (D) (3)/(20)

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

A speaks the truth in 70 percent cases and B in 80 percent. The probability that they will contradict each. other when describing a single event is

Probability that A speaks truth is 3/5 , and that for B is 7/10 . If they agree on a statement, then probability that this statement is true is

A speaks truth in 80% of the cases while B speaks truth in 60% of the cases. Find the probability that they will contradict each other while stating the same fact.

Probability that A speaks truth is 4/5 . A coin is tossed and A reports that a tail appears. Find the probability that actually there was tail.

A DAS GUPTA-Screening Tests-Exercise
  1. If the lines (x-1)/2=(y+1)/3=(z-1)/4 and (x-3)/1=(y-k)/2=z/1 intersec...

    Text Solution

    |

  2. Let vec a , vec b, vec c be three non-zero vectors such that any two ...

    Text Solution

    |

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

    Text Solution

    |

  4. If three distinct numbers are chosen randomly from the first 100 natur...

    Text Solution

    |

  5. If 4x^4 +9y^4= 64 then the maximum value of x^2+y^2 is (where x and y ...

    Text Solution

    |

  6. If log30(3)=alpha and log30(5)=beta, then log30(8) is equal to

    Text Solution

    |

  7. An infinite G.P has first term x and sum 5 then x belongs to ?

    Text Solution

    |

  8. The number of ways of distributing 8 identical balls in 3 distinct box...

    Text Solution

    |

  9. The coefficient of the middle term in the binomial expansion in powers...

    Text Solution

    |

  10. If (n-1)Cr=(k^2-3)nC(r+1),then k belong to

    Text Solution

    |

  11. If the graph of the function y = f(x) is symmetrical about the line x ...

    Text Solution

    |

  12. If the sides of a triangle are in the ratio 1 : sqrt3 : 2, then the an...

    Text Solution

    |

  13. Let f(x) be a strictly increasing and differentiable function, then li...

    Text Solution

    |

  14. If f(x) = x^(a) log x and f(0) = 0 then the value of alpha for which ...

    Text Solution

    |

  15. Let f(x) = (1-tanx)/(4x-pi), x != (pi)/4, x in [0,(pi)/2]. If f(x) is ...

    Text Solution

    |

  16. Let f(x+y)+f(x-y)=2f(x)f(y) AA x,y in R and f(0)=k, then

    Text Solution

    |

  17. The area enclosed between the curves y=ax^2 and x=ay^2(a > 0) is 1 sq....

    Text Solution

    |

  18. lim(nrarroo) sum(r=1)^n 1/n e^(r/n) is (A) 1-e (B) e-1 (C) e (D) e+1

    Text Solution

    |

  19. The angle between the tangents drawn from the point (1,4) to the par...

    Text Solution

    |

  20. A variable circle passes through the fixed point A(p,q) and touches t...

    Text Solution

    |