state gov Patna Civil Court Clerk/Reader Mock Test Series Quantitative Aptitude Ratio and Proportion Componendo or Dividendo
If \(\rm \frac{a+b}{b+c}=\frac{c+d}{d+a}\) a ≠ c, then which one of the following is correct ?
1
a + b = c + d
2
a + c = b + d
3
a - b - c + d = 0
4
a + b + c + d = 0