Home
Class 12
MATHS
In the box there are a white and b black...

In the box there are a white and b black balls. Two persons A and B takes ball one after the other and each time ball is placed back in box. Person A starts the game. If white ball is obtained then person A wins the game probability of winning game by person A is double then the winning probability of person B. Then `a : b =` .........

A

`1 : 2`

B

`2 : 1 `

C

`1 : 1`

D

`1 : 3 `

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    KUMAR PRAKASHAN|Exercise Practice Paper - 13 (Section - A (Choose the correct option))|6 Videos

  • PROBABILITY

    KUMAR PRAKASHAN|Exercise Practice Paper - 13 (Section - B (Answer the following questions))|4 Videos

  • PROBABILITY

    KUMAR PRAKASHAN|Exercise Solutions of NCERT Exemplar Problems (Fillers) |5 Videos

  • MATRICES

    KUMAR PRAKASHAN|Exercise Practice Paper - 3 (Section - D)|1 Videos

  • RELATIONS AND FUNCTIONS

    KUMAR PRAKASHAN|Exercise Practice Paper - 1 (Section - D)|2 Videos

Similar Questions

Explore conceptually related problems

A bag contains a white and b black balls. Two players, A and B alternately draw a ball from the bag, replacing the ball each time after the draw till one of them draws a white ball and wins the game. A begins the game. If the probability of A winning the game is three times that of B , then find the ratio a : b

A and B throw a pair of dice alternately. A wins the game if he gets a total of 6 and B wins if she gets a total of 7. It A starts the game, then find the probability of winning the game by A in third throw of the pair of dice.

Three students A, B and C participate in the swimming competition. The probability that A and B win the game is same. The probability of B to win the game is twice the probability of C to win the game. Then the probability to win B or C is .......

A and B stand in a ring with 10 other persons. If the arrangement of the persons is at random, then the probability that there are exactly 3 persons between A and B is

An urn contains 10 black and 5 white balls. Two balls are drawn from the urn one after the other without replacement. What is the probability that both drawn balls are black ?

An urn contains 7 white, 5 black and 3 read balls. Two balls are drawn at random. Find the probability that. (i) Both the balls are red. (ii) One balls is red and other is black. One ball is white.

Seven white and 3 black balls are placed in a row. What is the probability if two black balls do not occur together ?

KUMAR PRAKASHAN-PROBABILITY-Multiple Choice Questions (MCQs)
  1. A man is known to speak truth 3 out of 4 times. He throws a die and r...

    Text Solution

    |

  2. A purse contains 4 copper and 3 silver coins while another purse conta...

    Text Solution

    |

  3. In the box there are a white and b black balls. Two persons A and B ta...

    Text Solution

    |

  4. The probability of an event that person hits the target is (1)/(4). He...

    Text Solution

    |

  5. Each element of the second order determinant is 1 and - 1 then ..........

    Text Solution

    |

  6. A coin is tossed 2n times. During the toss any person can't get head a...

    Text Solution

    |

  7. For events E and F if P(E) le P(F) and P(E cap F) gt 0 then …………

    Text Solution

    |

  8. The probability that a student is not a swimmer is (4)/(5). The probab...

    Text Solution

    |

  9. The probability distribution of random variable X is as follows. ...

    Text Solution

    |

  10. Mean and variance of binomial distribution of random variance X are 4 ...

    Text Solution

    |

  11. In experiment probability that event A occurs in first trail is 0.4 th...

    Text Solution

    |

  12. Probability distribution of random variable X is as follows : The...

    Text Solution

    |

  13. A random variable X has the probability distribution: For the eve...

    Text Solution

    |

  14. If a random variable X can take all non- negative integral values and ...

    Text Solution

    |

  15. The mean and standard deviation of a random variable X are 10 and 5 re...

    Text Solution

    |

  16. The probability distribution of a random variable X is given below : ...

    Text Solution

    |

  17. Mean of the following probability distribution is …………

    Text Solution

    |

  18. A fair dice is rolled 6 times. If "getting an even number" is a succes...

    Text Solution

    |

  19. A fair dice is rolled 6 times. If "getting a prime number" is a "succe...

    Text Solution

    |

  20. A bag consists of 10 balls each marked with one e digits 0 to 9. If fo...

    Text Solution

    |