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AMU MCA Previous Year Questions (PYQs)

AMU MCA Ratio And Proportion PYQ

AMU MCA PYQ
The number that must be added to the terms of the ratio $11 : 29$ to make it equal to $11 : 20$ is:





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AMU MCA Previous Year PYQ AMU MCA AMU MCA 2024 PYQ

Solution

Let the required number be $x$ $\frac{11 + x}{29 + x} = \frac{11}{20}$ $20(11 + x) = 11(29 + x)$ $220 + 20x = 319 + 11x$ $9x = 99$ $x = 11$
AMU MCA PYQ
In a class the ratio of boys and girls is 4 : 3. If 7 girls join the class, the ratio of boys and girls becomes 3 : 4. Then the number of boys in the class is:





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AMU MCA Previous Year PYQ AMU MCA AMU MCA 2024 PYQ

Solution

Initial ratio $= 4 : 3$ Let boys $= 4x$, girls $= 3x$ After 7 girls join: $\frac{4x}{3x + 7} = \frac{3}{4}$ $16x = 9x + 21$ $7x = 21$ $x = 3$ Number of boys $= 4x = 12$
AMU MCA PYQ
0.5 of a number is equal to 0.07 of another. The ratio of the numbers is:





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AMU MCA Previous Year PYQ AMU MCA AMU MCA 2024 PYQ

Solution

Let the numbers be $x$ and $y$ $0.5x = 0.07y$ $\frac{x}{y} = \frac{0.07}{0.5}$ $\frac{x}{y} = \frac{7}{50}$ Ratio $= 7 : 50$

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