Home
Class 10
MATHS
4 Defective Pens Are Accidentally Mixed ...

4 Defective Pens Are Accidentally Mixed with 16 Good Ones. It is Not Possible to Just Look at a Pen and Tell Whether Or Not It is Defective. One Pen is Drawn at Random from the Lot
Suppose the pen drawn is defective and is not replaced. Now one more pen is drawn at random from the rest. What is the probability that this pen is : (a) defective ? (b) not defective ?

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    ICSE|Exercise EXERCISE 25(B)|59 Videos

  • MIXED PRACTICE

    ICSE|Exercise SET B|52 Videos

  • QUADRATIC EQUATIONS

    ICSE|Exercise Competency Based Questions|10 Videos

Similar Questions

Explore conceptually related problems

(i) 4 defective pens are accidentally mixed with 16 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is drawn at random from the lot. What is the probability that the pen is defective ?

A lot of20 bulbs contain 4 defective ones. One bulb is selected at random from a lot.Suppose the bulb drawn in (i) is not defective and not replaced. Now bulb is drawn at random from the rest. What is the probability that this bulb is not defective?

12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

12 defective pens are accidently mixed with 132 good ones. It is not possible to just look at pen and tell whether or not it is defective. one pen is taken out at random from this lot. Determine the probability that the pen taken out is good one.

A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?

A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is good.

(i) A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?(ii) Suppose the bulb drawn in (i) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective ?

14 defective bulbs are accidentally mixed with 98 good ones. It is not possible to just look at the bulb and tell whether it is defective or not. One bulb is taken out at random from this lot. Determine the probability that the bulb taken out is a good one.

14 defective bulbs are accidentally mixed with 98 good ones. It is not possible to just look at the bulb and tell whether it is defective or not. One bulb is taken out at random from this lot. Determine the probability that the bulb taken out is a good one.

It is known that a box of 200 electric bulbs contains 16 defective bulbs. One bulb is taken out at random from the box. What is the probability that the bulb drawn is (i) defective, (ii) non-defective?

ICSE-PROBABILITY-EXERCISE 25(C)
  1. A box contains 150 bulbs out of which 15 are defective. It is not poss...

    Text Solution

    |

  2. (i) 4 defective pens are accidentally mixed with 16 good ones. It is n...

    Text Solution

    |

  3. 4 Defective Pens Are Accidentally Mixed with 16 Good Ones. It is Not P...

    Text Solution

    |

  4. A bag contains 100 identical marble stones which are numbered from 1 t...

    Text Solution

    |

  5. A bag contains 100 identical marble stones which are numbered from 1 t...

    Text Solution

    |

  6. A bag contains 100 identical marble stones which are numbered from 1 t...

    Text Solution

    |

  7. A bag contains 100 identical marble stones which are numbered from 1 t...

    Text Solution

    |

  8. A bag contains 100 identical marble stones which are numbered from 1 t...

    Text Solution

    |

  9. A circle with diameter 20 cm is drawn somewhere on a rectangular piece...

    Text Solution

    |

  10. A circle with diameter 20 cm is drawn somewhere on a rectangular piece...

    Text Solution

    |

  11. Two dice (each bearing numbers 1 to 6) are rolled together. Find the p...

    Text Solution

    |

  12. Two dice (each bearing numbers 1 to 6) are rolled together. Find the p...

    Text Solution

    |

  13. Two dice (each bearing numbers 1 to 6) are rolled together. Find the p...

    Text Solution

    |

  14. Two dice (each bearing numbers 1 to 6) are rolled together. Find the p...

    Text Solution

    |

  15. Two dice (each bearing numbers 1 to 6) are rolled together. Find the p...

    Text Solution

    |

  16. Three coins are tossed together. Write all the possible outcomes. Now,...

    Text Solution

    |

  17. Three coins are tossed together. Write all the possible outcomes. Now,...

    Text Solution

    |

  18. Three coins are tossed together. Write all the possible outcomes. Now,...

    Text Solution

    |

  19. Three coins are tossed together. Write all the possible outcomes. Now,...

    Text Solution

    |

  20. Three coins are tossed together. Write all the possible outcomes. Now,...

    Text Solution

    |