Home
Class 12
MATHS
A bag contains 10 balls of which some...

A bag contains 10 balls of which some are black and others are white. A person draws 6 balls & finds that 3 of them are white & 3 of them are black. Find probability that number of white balls in bag are same as black balls is `m/n` , (where `m` and `n` are relatively prime) , then which of the following is/are True? `m+n=43` (b) `m-n=23` `m n=330` (d) `m+n=40`

Promotional Banner

Topper's Solved these Questions

  • INVERSE TRIGONOMETRIC FUNCTIONS

    RESONANCE DPP ENGLISH|Exercise All Questions|15 Videos

  • MATRICES

    RESONANCE DPP ENGLISH|Exercise All Questions|7 Videos

Similar Questions

Explore conceptually related problems

A bag contain n white and n black balls, all of equal size. Balls are drawn at random. Find the probability that there are both white and black balls in the draw and that the number of white balls is greater than that of black balls by 1.

There are 4 white, 3 black and 3 red balls in a bag. Find the number of ways of selecting three balls, if at least one black ball is there.

A bag contains 15 white balls and some black balls. If the probability of drawing a black ball is thrice that of a white ball, find the number of black balls in the bag.

A bag contains 3 red, 7 white, and 4 black balls. If three balls are drawn from the bag, then find the probability that all of them are of the same color.

A bag contains 3 red, 7 white, and 4 black balls. If three balls are drawn from the bag, then find the probability that all of them are of the same color.

A bag A contains 3 white and 2 black balls and another bag B contains 2 white and 4 black balls. A bag and a ball out of it are picked at random. What is the probability that the ball is white?

There are 4 white and 3 black balls in a bag. Find the probability of drawing 2 white ball one by one without replacement.

A bag contains 7 white, 5 black and 4 red balls, find the probability that the balls is white.

A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn is : (iii) a white ball.

A bag contains 3 black and 4 white balls. Second bag contains 5 black and 6 white balls. A ball is drawn at random from one of the bags and it is found to be black. What is the probability that this ball is drawn from second bag?

RESONANCE DPP ENGLISH-JEE MAINS-All Questions
  1. Find the angle of intersection of the curves y=4-x^(2) and y=x^(2)

    Text Solution

    |

  2. Let f and g be two real values functions defined by f(x)= x + 1 and ...

    Text Solution

    |

  3. A bag contains 10 balls of which some are black and others are whit...

    Text Solution

    |

  4. If 2a^2 - 7ab -ac +3b^2-2bc-c^2=0 then the family of lines ax + by + c...

    Text Solution

    |

  5. Two small squares on a chess board are chosen at random. Then, the pro...

    Text Solution

    |

  6. If 4 squares are chosen at random on a chess board, the probability th...

    Text Solution

    |

  7. Tangent to the parabola y=x^(2)+ax+1 at the point of intersection of t...

    Text Solution

    |

  8. The area of the triangle whose sides. are 5 cm, 13 cm and 12 cm is

    Text Solution

    |

  9. The median of a set of 9 distinct observations is 20.5. If each of the...

    Text Solution

    |

  10. A relation R is defined on the set of circles such that "C(1)RC(2)impl...

    Text Solution

    |

  11. The coefficient of x^4 in the expansion of (1+x-2x^2)^7 is :

    Text Solution

    |

  12. If line x-2y-1=0 intersects parabola y^(2)=4x at P and Q, then find th...

    Text Solution

    |

  13. If tan B=(n sin A cos A)/(1-n cos^(2)A), then tan(A+B) equals to

    Text Solution

    |

  14. int(-1)^(1)(e^(-1//x))/(x^(2)(1+e^(-2//x))dx is equal to

    Text Solution

    |

  15. Construct the truth table for the followings statements : (a) (p^^q)...

    Text Solution

    |

  16. Given lines (x-4)/(2)=(y+5)/(4)=(z-1)/(-3) and (x-2)/(1)=(y+1)/(3)=(z)...

    Text Solution

    |

  17. .Let a1, a2, a3... be in AP and g1, g2... be in GP If a1, g1=2 and a...

    Text Solution

    |

  18. If f(x)={ax^3+b, for 0 le x le 1 and 2cospix+tan^-1x, for 1 < x le 2 b...

    Text Solution

    |

  19. The straight line (x)/(4)+(y)/(3) =1 intersects the ellipse (x^(2))/(1...

    Text Solution

    |

  20. The area bounded by the curve y=|cos^(-1)(sinx)|-|sin^(-1)(cosx)| and ...

    Text Solution

    |