Home
Class 12
MATHS
Ram is visiting a friend. Ram knows th...

Ram is visiting a friend. Ram knows that his friend has 2 children and 1 of them is a boy. Assuming that a child is equally likely to be a boy or a girl, then the probability that the other child is a girl, is

A

`1//2`

B

`1//3`

C

`2//3`

D

`7//10`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2013

    WB JEE PREVIOUS YEAR PAPER|Exercise MULTIPLE CHOICE QUESTIONS|80 Videos
  • QUESTION PAPER 2015

    WB JEE PREVIOUS YEAR PAPER|Exercise MULTIPLE CHOICE QUESTIONS|80 Videos

Similar Questions

Explore conceptually related problems

Given that a family of two children has a boy , what is the probability that the other also is a boy?

There are two children in a family.One of them is a girl child .What is probability that the other one is also a girl child?

4 boys and 2 girls occupy seats in a row at random. Then the probability that the two girls occupy seats side by side is

Assume that each child born is equally likely to be a boy or a girl. If a family has two children, what is the conditional probability that both are girls given that the youngest is a girl ?

A family has 5 daughters. Probability of 6th child being boy will be

Find the probability that in a family of 4 children there will be at least one boy. (Assume that the probability of a male child is 1/2 )

It is known that a family has 3 childern and at least 1 of these 3 childern is boy. Find the probability that 2 of the 3 chilidren are boys.

Assume that each born child is equally likely to be a boy or a girl. If a family has two children, what is the conditional probability that both are girls given that  (i) the youngest is a girl, (ii) at least one is a girl?

4 boys and 2 girls occupy seats in a row at random. What is the probability that the girls occupy seats side by side?

It is known that the probability of a male birth is (1)/(2) , then the probability of a least one boy and one girl in a family of 6 children is -

WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2014-MULTIPLE CHOICE QUESTIONS
  1. The function f(x)=x^(2)+bx+c, where b and c real constants, describes

    Text Solution

    |

  2. Let n ge 2 bet an integer, A=((cos(2pi//n),sin(2pi//n),0),(-sin(2pi//n...

    Text Solution

    |

  3. Ram is visiting a friend. Ram knows that his friend has 2 children ...

    Text Solution

    |

  4. The value of the sum (""^(n)C(1))^(2)+(""^(n)C(2))^(2) +(""^(n)C(3))^(...

    Text Solution

    |

  5. The remainder obtained when 1!+2!+3!+…+11! is divided by 12 is

    Text Solution

    |

  6. Out of 7 consonants and 4 vowels, the number of words (not necessarily...

    Text Solution

    |

  7. Let S=(2)/(1)""^(n)C(0)+(2^(2))/(2)""^(n)C(1)+(2^(3))/(3)""^(n)C(2)+…+...

    Text Solution

    |

  8. Let RR be the set of all real numbers and f:[-1,1] to RR be defined by...

    Text Solution

    |

  9. If a, b and c are positive numbers in a G.P., then the roots of th...

    Text Solution

    |

  10. There is a group of 265 persons who like either singing or dancing o...

    Text Solution

    |

  11. The range of the function y=3sin(sqrt((pi^(2))/(16)-x^(2))) is

    Text Solution

    |

  12. The value of lim( x to 0) (int(0)^(x^(2)) cos(t^(2))dt)/(x sinx) is

    Text Solution

    |

  13. Let f(x) be a differentiable function and f'(4)=5. Then lim(x to 2) (f...

    Text Solution

    |

  14. The sum of the series sum(n=1)^(oo) sin((n !pi)/(720)) is

    Text Solution

    |

  15. Let I denote the 3xx3 identity matrix and P be a matrix obtained by ...

    Text Solution

    |

  16. The coefficient of x^(3) in the infinite series expansion of (2)/((1-x...

    Text Solution

    |

  17. For every real number x, let f(x)=(x)/(1!)+(3)/(2!) x^(2)+(7)/(3!) x...

    Text Solution

    |

  18. Let S denote the sum of the infinite series 1+(8)/(2!)+(21)/(3!) +(40...

    Text Solution

    |

  19. Let [x] denote the greatest integer less than or equal to x for any re...

    Text Solution

    |

  20. Suppose that f(x) is a differentiable function such that f'(x) is con...

    Text Solution

    |