engineering recuitment FSSAI Assistant Mock Test 2021 Quantitative Aptitude Ratio and Proportion Componendo or Dividendo
If \(\frac{x}{y} = \frac{{a + 2}}{{a - 2}},\) then \(\frac{{{x^2} - {y^2}}}{{{x^2} + {y^2}}}\) is equal to
1
\(\frac{{4a}}{{{a^2} - 4}}\)
2
\(\frac{4}{{{a^2}}}\)
3
\(\frac{{8a}}{{{a^2} + 4}}\)
4
\(\frac{{4a}}{{{a^2} + 4}}\)