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In a game, a man wins Rs. 5 for getting a number greater than 4 and loses Rs. 1 otherwise, when a fair die is thrown. The man decided to throw a die thrice but to quit as and when he gets a number greater than 4. Find the expected value of the amount he win/loses.

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
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  2. Evaluate : int0^(pi/2)(sin^2x)/(sin x+cos x)dx

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  3. In a game, a man wins Rs. 5 for getting a number greater than 4 and ...

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

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  6. Solve the equation of x:sin^(-1)x+sin^(-1)(1-x)=cos^(-1)x

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  7. Five bad oranges are accidently mixed with 20 good ones. If four or...

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  8. Use elementary column operation C2->C2+2C1 in the following matrix equ...

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  9. Write the number of all possible matrices of order 2xx2 with each ent...

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  10. If x in N and |[x+3,-2],[-3x,2x]|=8, then find the value of x

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  11. Find the vector equation of the plane with intercepts 3,-4 and 2 on x ...

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  12. Find the coordinates of the point where the line through the points A(...

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  13. Find the position vector of a point which divides the join of points w...

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  14. Write the number of vectors of unit length perpendicular to both the ...

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  15. The two adjacent sides of a parallelogram are 2 hat i-4 hat j-5 hat k ...

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  16. Show that the binary operation * on A=R-{-1} defined as a*b=a+b+a b fo...

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  17. Using integration find the area of the region "{"(x , y")":x^2+y^2lt=2...

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  18. An urn contains 3 white and 6 red balls. Four balls are drawn one by o...

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  19. Find the coordinate of the point P where the line through A(3,-4,-5) a...

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  20. Let f: N -> S be a function defined as f(x)=9x^2+6x-5. Show that f:N -...

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