Percentage
- In a city, 40% of the people are illiterate and 60% are poor. Among the rich, 10% are illiterate. The percentage of the illiterate poor population is
-
View Hint View Answer Discuss in Forum
Let the population of the city be 100.
Total illiterate people = 40
Poor people = 60
Rich people = 40
Illiterate rich people= 40 × 10 = 4 100
∴ Illiterate poor people
= 40 – 4 = 36
∴ Required per cent= 36 × 100 = 60% 60 Correct Option: B
Let the population of the city be 100.
Total illiterate people = 40
Poor people = 60
Rich people = 40
Illiterate rich people= 40 × 10 = 4 100
∴ Illiterate poor people
= 40 – 4 = 36
∴ Required per cent= 36 × 100 = 60% 60
- The population of a city is 20000. It increases by 20% during the first year and 30% during the second year. The population after two years will be:
-
View Hint View Answer Discuss in Forum
Population of city after two years
= P 
1 + R1 
1 + R2 100 10 = P 1 + 20 1 + 30 100 10 = 20000 × 120 × 130 = 31200 100 100 Correct Option: C
Population of city after two years
= P 1 + R1 1 + R2 100 10 = P 1 + 20 1 + 30 100 10 = 20000 × 120 × 130 = 31200 100 100
