Home
Class 12
MATHS
A fair die is thrown 20 times. The proba...

A fair die is thrown 20 times. The probability that on the 10th throw, the fourth six appears is `^20 C_(10)xx5^6//6^(20)` b. `120xx5^7//6^(10)` c. `84xx5^6//6^(10)` d. none of these

A

`(""20C_(10) xx 5^6)/(6^20)`

B

`(120xx5^(7))/6^(10)`

C

`(84xx5^(6))/6^(10)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY -2

    DISHA PUBLICATION|Exercise EXERCISE - 1 : CONCEPT BUILDER|60 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    DISHA PUBLICATION|Exercise Exercise-2 Concept Applicator|20 Videos

  • PROBABILITY-1

    DISHA PUBLICATION|Exercise EXERCISE-1 : CONCEPT BUILDER|180 Videos

Similar Questions

Explore conceptually related problems

A fair die is thrown 20 times. The probability that on the 10th throw, the fourth six appears is a."^20 C_(10)xx5^6//6^(20) b. 120xx5^7//6^(10) c. 84xx5^6//6^(10) d. none of these

A fair die is tossed eight xx.The probability that a third six observed in eight throw is (7C_(10)xx5^(7))/(6^(7)) b.(7C_(2)xx5^(2))/(6^(8)) c.(7C_(2)xx5^(5))/(6^(6))d none of these

A die is thrown 560 times. The number 6 appears on the upper face 72 times. A die is thrown at random. What is the probability of getting 6.

The sum of the first 20 terms of the series (1)/(5xx6)+(1)/(6xx7)+(1)/(7xx8)+backslash is (a) 0.16(b)1.6c(c)16(d) None of these

Radium has atomic weight 226 and half life of 1600 years. The number of disintegrationsd produced per second from one gram is a. 4.8 xx 10^(10) b. 3.7 xx 10^(20) c. 9.2 xx 10^(6) d. 3.7 xx 10^(8)

A speaks the truth 4 out of 5 xx.He throws a die and reports that there was a 6, the probability that actually there was a 6 is

0.000006723 when expressed in scientific notation,is 6723xx10^(-5) (b) 67.23xx10^(-7) (c) 6.723xx10^(-6)(d) None of these

write the product in lowest terms. 3""13/20 times 6""5/10 times 5

DISHA PUBLICATION-PROBABILITY -2-EXERCISE - 2 : CONCEPT APPLICATOR
  1. The probability of India winning a test match against West Indies i...

    Text Solution

    |

  2. A coin is tossed three times in succession. If E is the event that ...

    Text Solution

    |

  3. A die marked 1, 2, 3 in red and 4, 5, 6 in green is tossed. Let A be ...

    Text Solution

    |

  4. For two events A and B, if P(A)P((A)/(B))=(1)/(4) and P((B)/(A))=(1)/(...

    Text Solution

    |

  5. If E and F are independent events such that 0ltP(E)lt1 and 0ltP(F)lt1,...

    Text Solution

    |

  6. Two aeroplanes I and II bomb a target in succession. The probabilities...

    Text Solution

    |

  7. If A and B play a series of games in each of which probability that A ...

    Text Solution

    |

  8. In a competitive examination, an examinee either guesses or copies or ...

    Text Solution

    |

  9. Suppose X is a random variable which takes values 0,1,2,3,.... and P(X...

    Text Solution

    |

  10. Die A has 4 red and 2 white faces, whereas die B has 2 red and 4 wh...

    Text Solution

    |

  11. A and B are two independent witnesses in a case. The probability that ...

    Text Solution

    |

  12. Girl students constitute 10% of I year and 5% of II year at Roorkee Un...

    Text Solution

    |

  13. A man takes a step forward with probability 0.4 and backward with prob...

    Text Solution

    |

  14. If X and Y are independent binomial vatiates B(5,1/2) and B(7,1/2) and...

    Text Solution

    |

  15. Suppose that the probability that an item produced by a particular mac...

    Text Solution

    |

  16. A fair die is thrown 20 times. The probability that on the 10th thr...

    Text Solution

    |

  17. A box contains 20 identical balls of which 10 are blue and 10 are gree...

    Text Solution

    |

  18. In a college, 30% students fail in physics, 25% fail in Mathematics an...

    Text Solution

    |

  19. A person write 4 letters and addresses 4 envelopes. If the letters ...

    Text Solution

    |

  20. In a bolt factory, machines A, B and C manufacture 60%, 25% and 15% re...

    Text Solution

    |