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An urn contains 4 balls. Two balls are d...

An urn contains 4 balls. Two balls are drawn at random from the urn (without replacement) and are found to be white. What is the probability that all the four balls in the urn are white ?

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XII BOARDS PREVIOUS YEAR-BOARD PAPER SOLUTIONS-All Questions
  1. Find : int(sin^(-1)sqrt(x)-cos^(-1)sqrt(x))/(sin^(-1)sqrt(x)+cos^(-1)s...

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  2. In a game, a man wins rupees five for a six and loses rupee one for...

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  3. An urn contains 4 balls. Two balls are drawn at random from the urn...

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  4. Solve: tan^(-1)x+2cot^(-1)x=(2pi)/3

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  5. Find the value of cos^(-1)((x)/(2)+(sqrt(3-3x^(2)))/(2))

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  6. One kind of cake requires 200 g of flour and 25 g of fat, another k...

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  7. Using integration, find the area of the triangle PQR, coordinates o...

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  8. A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, ...

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  9. AB is a diameter of a circle and C is any point on the circumference o...

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

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  11. Let * R*Rvec given by (a , b) vec (a+4b^2) is a binary operation. C...

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  12. The elements a(i j) of a 3xx3 matrix are given by a(i j)=1/2|-3i+j|dot...

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  13. Write the principal value of tan^(-1)[sin(-pi/2)]

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  14. If (2x4)(x-8)=0 , find the positive value of x

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  15. Write the value of |[2, 7, 65],[ 3, 8, 75],[ 5, 9, 86]|

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  16. Find int(sin^6x)/(cos^8x)dxdot

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  17. Evaluate: int(tan^(-1)x)/(1+x^2)dx

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  18. If | vec a|=8,| vec b|=3 and | vec a x vec b|=12 , find the angle betw...

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  19. Find the angle between x-axis and the vector hat i+ hat j+ hat k

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  20. Find the vector vec p which is perpendicular to both vecalpha=4 hat ...

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