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Given three identical boxes I, II and...

Given three identical boxes I, II and III each containing two coins. In box I, both coins are gold coins, in box II, both are silver coins and in box III, there is one gold and one silver coin. A person chooses a box at random and takes out a coin. If the coin is of gold, what is the probability that the other coin in the box is also of gold?

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XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
  1. If A^(-1) =[(3,-1,1),(-15,6,-5),(5,-2,2)] and B = [(1,2,-2), (-1,3,0),...

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  2. A merchant plans to sell two types of personal computers — a deskto...

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  3. Given three identical boxes I, II and III each containing two coins...

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  4. Prove that: int0^(pi/4)(sqrt(tanx)+sqrt(cotx)\ dx=sqrt(2)dotpi/2

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  5. Find the shortest distance between the following lines whose vector...

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  6. Using vectors, find the area of the triangle with vertices A (1, 1,...

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  7. Using matrices, solve the following system of equations: 4x+3y+3z=6...

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  8. A random variable X has the following probability distribution: ...

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  9. A window has the shape of a rectangle surmounted by an equilateral ...

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  10. Find the distance of the point (-1,\ -5,\ -10) , from the point of int...

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  11. Show that the right-circular cone of least curved surface and given...

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  12. How many times must a man toss a fair coin, so that the probability...

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  13. Using elementary transformations, find the inverse of the matrix [[-1,...

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  14. Find the equation of the tangent to the curve y=sqrt(3x-2) which is...

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  15. Find the intervals in which the function f given by f(x)=\ x^3+1/(...

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  16. Prove that sin^(-1)(63/65)=sin^(-1)(5/13)+cos^(-1)(3/5)

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  17. Evaluate: int0^(2pi)1/(1+e^(sinx))dx

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  18. Solve for x : 2tan^(-1)(sinx)=tan^(-1)(2secx),\ x!=pi/2

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  19. Prove the following: cot^(-1)[(sqrt(1+sinx )+sqrt(1-sinx))/(sqrt(1+sin...

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  20. Find the value of tan^(-1)(x/y)-tan^(-1)((x-y)/(x+y))

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