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In a competitive exam, 3 marks are to b...

In a competitive exam, 3 marks are to be awarded for every correct answer and for every wrong answer, 1 mark will be deducted. Madhu scored 40 marks in this exam. Had 4 marks been awarded for each correct answer and 2 marks deducted for each incorrect answer, Madhu would have scored 50 marks. How many questions were three in the test?

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The correct Answer is:
Total number of questions = 20
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VGS PUBLICATION-BRILLIANT-PAIR OF LINEAR EQUATIONS IN TWO VARIABLES-EXERCISE
  1. In a competitive exam, 3 marks are to be awarded for every correct an...

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  2. The cost of 1kg potatoes and 2 kg tomatoes was Rs. 30 on a certain day...

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  3. The coach of a cricket team of M.K.Nagar High School buys 3 bats and 6...

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  4. Is a dependent pair of linear equations always consistent? Why or why ...

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  5. Which of the following equations is not a linear equation?

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  6. Which of the following is a linear equation in one variable?

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  7. Which of the following numbers is a solution for the equation 2(x+3)=1...

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  8. The value of x which satisfies the equation 2x-(4-x)=5-x is

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  9. The equation x-4y=5 has

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  10. In the example given above, can you find the cost of each bat and ball...

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  11. For what value of 'p' the following pair of equations has a unique sol...

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  12. Find the value of 'k' for which the pair of equations 2x-ky+3=0, 4x+6y...

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  13. For what value of 'k', the pair of equation 3x+4y+2=0 and 9x+12y+k=0 r...

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  14. For what positive values of 'p' the folllowing pair of linear equation...

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  15. Represent the following systems of equations graphically and comment o...

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  16. Solve the following systems of equations: x+y=2, 2x+2y=4.

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  17. Solve the following systems of equations: 2x-y=4, 4x-2y=6.

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  18. Represent the pair of linear equations x+2y-4=0 and2x+4y-12=0 graphica...

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  19. Check each of the given sustems of equations to see if has a unique so...

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  20. Check each of the given sustems of equations to see if has a unique so...

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  21. Check each of the given sustems of equations to see if has a unique so...

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