Home
Class 12
MATHS
An urn contains 5 red and 2 green balls,...

An urn contains 5 red and 2 green balls, one ball is chosen from urn. If it is red then a green ball is put back into Box, and if it green then a red ball is put in to box (previous ball was not put in that box). Then a second ball is drawn the probebility that it is red ball is (a) `(32)/(49)` (b) `(17)/(49)` (c) `(15)/(49)` (d) `(36)/(49)`

Promotional Banner

Topper's Solved these Questions

  • JEE MAIN

    JEE MAINS PREVIOUS YEAR ENGLISH|Exercise MATH|21 Videos

  • LIMITS AND DERIVATIVES

    JEE MAINS PREVIOUS YEAR ENGLISH|Exercise All Questions|5 Videos

Similar Questions

Explore conceptually related problems

An urn contains 5 red and 2 green balls. A ball is drawn at random from the urn. If the drawn ball is green, then a red ball is added to the urn and if the drawn ball is red, then a green ball is added to the urn, the original ball is not returned to the urn. Now, a second ball is drawn at random from it. The probability that the second ball is red is

An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability that the ball drawn is white.

A bag contains 9 red and 12 white balls one ball is drawn at random. Find the probability that the ball drawn is red.

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the um and then a ball is drawn at random. What is the probability that the second ball is red?

An urn contains 9 red 7 white and 4 black balls. A ball is drawn at random. The probability that ball drawn is neither black nor red is

An urn contains 4 white and 3 red balls. Three balls are drawn at random from the urn with replacement. Find the probability distribution of the number of red balls.

A bag contains 6 red and 5 blue balls and another bag contains 5 red and 8 blue balls. A ball is drawn from the first bag and without noticing its colour is put in the second bag. A ball is then drawn from the second bag. Find the probability that the ball drawn is blue in colour.

A bag contains 5 red, 8 green and 7 white balls. One ball is drawn at random from the bag. What is the probability of getting a white ball or a green ball?

A box contains 4 white and 5 black balls. A ball is drawn at random and its colour is noted. A ball is then put back in the box along with two additional balls of its opposite colour. If a ball is drawn again from the box, then the probability that the ball drawn now is black, is

A bag contains 10 red 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball being a (i) red ball (ii) green ball (iii) not a blue ball

JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-All Questions
  1. If sum(i=1)^n(xi+1)^2=9n and sum(i=1)^n(xi-1)^2=5n, then standard devi...

    Text Solution

    |

  2. The number of natural numbers less than 7,000 which can be formed by u...

    Text Solution

    |

  3. An urn contains 5 red and 2 green balls, one ball is chosen from urn. ...

    Text Solution

    |

  4. Find sum of first 15 term of series 1+6+(9(1^2+2^2+3^2))/7+(12(1^2+2^2...

    Text Solution

    |

  5. Let z(0) be a root of the quadratic equation x^(2) + x + 1 = 0. If z =...

    Text Solution

    |

  6. let veca=hati+hatj+sqrt2hatk vecb=b1hati+b2hatJ+sqrt2hatk vecc=5hati+...

    Text Solution

    |

  7. int(0)^((pi)/(3))(tanx)/(sqrt(2ksecx))dx=1-(1)/(sqrt2), then value of ...

    Text Solution

    |

  8. Find number of solution of equation sinx-sin2x+sin3x=0 in 0lexle(pi)/(...

    Text Solution

    |

  9. Find area enclosed by curve 0leylex|x|+1 between -1lexle1 (a) ...

    Text Solution

    |

  10. Find the value of lim(xrarr0)(x(([x]+|x|)sin[x]))/(|x|). (a) -...

    Text Solution

    |

  11. Let y=y(x) is a solution of (dy)/(dx)=f(x) where f(xy)=f(x)f(y) AA x,y...

    Text Solution

    |

  12. If A(4,-4) and B(9,6) lies on y^2=4x and a point C on arc AOB(O= ori...

    Text Solution

    |

  13. If the circles x^2+y^2-16x-20y+164=r^2 and (x-4)^2+(y-7)^2=36 intersec...

    Text Solution

    |

  14. Find the eccetricity of hyperbola through (4,2) whose centre is (0,0)...

    Text Solution

    |

  15. If x=3tant and y=3sect then find (d^2y)/(dx^2) at x=(pi)/(4) (...

    Text Solution

    |

  16. Let A={x:xepsilonR-{1}}f is defined from ArarrR as f(x)=(2x)/(x-1) the...

    Text Solution

    |

  17. Let a,b,c are 7^(th), 11^(th) and 13^(th) terms of constant A.P if a,b...

    Text Solution

    |

  18. Let real and distinct roots of equation x^2-mx+4=0 lies in [1,5] then ...

    Text Solution

    |

  19. If x=sin^-1(sin10) and y=cos^(-1)(cos10), then the value of (y-x) is ...

    Text Solution

    |

  20. Matrix=[[e^t,e^-t(sint-2cost),e^-t(-2sint-cost)],[e^t,-e^-t(2sint+cost...

    Text Solution

    |