Home
Class 12
MATHS
In tossing a fair coin twice, let A and ...

In tossing a fair coin twice, let A and B denote the events of occurrence of head on first toss and second toss respectively , then the value of `P(A cup B)` is -

A

`(1)/(4)`

B

`(1)/(2)`

C

`(3)/(4)`

D

`(1)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 7|80 Videos
  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 8|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 balanced coin is tossed three times in succession. Let A denote the event of getting 'head' in the first toss and B the event of getting 'tail' in the second toss. Prove that the events A and B are independent.

A com is tossed twice events E and Fare defined asfollows: E heads on 1st toss, F = heads on 2nd toss. Find the probability of E cup F .

A coin is tossed n times. The probability of getting head at least once is more than 0.8 , then the value of n is

A fair coin is tossed n times. Let a_(n) denotes the number of cases in which no two heads occur consecutively. Then which of the following is not true ?

One hundred identical coins, each with probability 'p' of showing heads are tossed once. If 0 lt p lt 1 and the probability of heads showing on 50 coins is equal to that of heads showing on 51 coins, then the value of p is

Three coins are tossed once. Let A denote the event 'three heads show", B denote the event "two heads and one tail show", C denote the event" three tails show and D denote the event 'a head shows on the first coin". Which events are (i) mutually exclusive? (ii) simple (iii) Compound?

A and B toss a coin alternately untill one of them gets a head for the first time and wins the toss. If A begin, find the respective probability ties for A and B to win the toss.

A fair coin is tossed 10 times. The probability of getting exactly 6 heads is -

A, B and C in order toss an unbiased coin. The first who throws 'head' wins. Find the respective probabilities of winning.

Let x denote the number of tails preceding the first head when an unbiased coin is tossed repeatedly find the probability distribution of x

CHHAYA PUBLICATION-MCQ ZONE -Question Paper 5
  1. Five horses are in a race. Mr. A selects two of the horses at random ...

    Text Solution

    |

  2. For three events A, B and C, if P(B)=(3)/(4),P(A^(c ) cap B cap C^(c )...

    Text Solution

    |

  3. In tossing a fair coin twice, let A and B denote the events of occurre...

    Text Solution

    |

  4. A bag X contains 2 white and 3 black balls and another bag Y contains ...

    Text Solution

    |

  5. A five digit number of formed by writing the digits 1, 2, 3, 4, 5 in ...

    Text Solution

    |

  6. The value of the determinant |(b^(2)c^(2),bc,b+c),(c^(2)a^(2),ca,c+a),...

    Text Solution

    |

  7. If |(cos(A+B),-sin(A+B),cos2B),(sinA,cosA, sinB),(-cosA, sinA, cosB)|=...

    Text Solution

    |

  8. If |(x,-3i,1),(y,1,i),(0,2i,-i)|=6+11i, then the values of x and y ar...

    Text Solution

    |

  9. If 1, omega, omega^(2) are the cube roots of unity, then the value of...

    Text Solution

    |

  10. If |(x+1,1,1),(2,x+2,2),(3,3,x+3)|=0, then the value of x is -

    Text Solution

    |

  11. If A=[(-i,0),(0,i)] then A^(T)A is equal to -

    Text Solution

    |

  12. If A=[(-1,2),(2,-1)], B=[(5),(7)] and AX=B then X is equal to -

    Text Solution

    |

  13. If i=sqrt(-1),P=[(i,0,-i),(0,-i,i),(-i,i,0)] and Q=[(-i,i),(0,0),(i,-...

    Text Solution

    |

  14. If A ne 0 and B ne 0 are two 2xx2 matrices such that AB = 0, then w...

    Text Solution

    |

  15. The value of |(log(3)512,log(4)3),(log(3)8,log(4)9)|xx|(log(2)3,log(8)...

    Text Solution

    |

  16. It is known that a lot of 10 articles contains 3 defectives. A sampl...

    Text Solution

    |

  17. If the mean and variance of a binomial distribution are (4)/(3) and...

    Text Solution

    |

  18. If the function f(x) is defined by f(x)=a+bx and f^(r )=fff…. (repea...

    Text Solution

    |

  19. The range of the function " "^(7-x)P(x-3) is -

    Text Solution

    |

  20. The domain of definition of the function f(x)=("sin"^(-1)(x-3))/(sqrt...

    Text Solution

    |