Answer:
Option C
Explanation:
Number of candidates failing from city D
= $\left(\frac{3}{4}\times2.27\times100000\right)$
= $\left(\frac{3}{4}\times\frac{227}{100}\times100000\right)$
= $\left(227\times750\right)$
Number of candidates failing from city A
= $\left(\frac{3}{10}\times1.25\times100000\right)$
= $\left(\frac{3}{10}\times\frac{125}{100}\times100000\right)$
= $\left(300\times125\right)$
Required ratio : $\left(\frac{227\times750}{300\times125}\right)$
= $\frac{227}{50}= 227:50$
