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CAT 2023 Set-3 | Quantitative Aptitude | Question-3

Q. 3)

For some real numbers $a$ and $b$, the system of equations $x+y=4$ and $(a+5) x+\left(b^{2}-15\right) y=8 b$ has infinitely many solutions for $x$ and $y$. Then, the maximum possible value of $a b$ is

  1. 15
  2. 55
  3. 33
  4. 25

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