A city has a population of 3,00,000 out of which 1,80,000 are males. 50\% of the population is literate. If 70\% of the males are literate, then the percentage of females who are literate is
(a)20\%
(b)25\%
(c)35\%
(d)45\%
Answer
Answer (as printed): A
Explanation
Number of males = 180000. Number of females $$=(300000-180000)=120000 .$$ Number of literates $=50 \%$ of $300000=150000$. Number of literate males $=70 \%$ of $180000=126000$. Number of literate females $=(150000-126000)=24000$. $$\text { ∴ } \text { Required percentage }=\left(\frac{24000}{120000} \times 100\right) \%=20 \% .$$
Explanation as extracted from the printed page; notation may be imperfect.