Percentage Practice Question and Answer
8 Q: The income of C is 20 % more than B's and the income of B is 25 % more than A’s. Find by how much percent is C's income more than A’s?
1572 05ee0d809ca41b347ed3512ea
5ee0d809ca41b347ed3512ea- 1150 %false
- 250 %true
- 325 %false
- 435 %false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "50 % "
Q: The average mathematics marks of two section A and B of class IX in the annual examination is 74. The average marks of Section A is 77.5 and that of Section B is 70. The ratio of number of student of section A and B is:
1560 05f15453d4cff381d16260554
5f15453d4cff381d16260554- 17 : 8false
- 28 : 5false
- 38 : 7true
- 47 : 5false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "8 : 7"
Q: The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?
1560 05f97f8f4d8201a50c268b81b
5f97f8f4d8201a50c268b81b- 18 : 9false
- 221 : 22true
- 317 : 18false
- 424 : 9false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "21 : 22"
Q: The passing score of an exam is 33 percent. Anshul scored 160 marks but failed by 38 marks. Then what percentage marks Anshul got.
1557 060373cf9cd43d04a8f4a763e
60373cf9cd43d04a8f4a763e- 130 %false
- 2$$ {26{2\over 3}}{\%} $$true
- 325 %false
- 4$$ {28{3\over 4}}{\%} $$false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "$$ {26{2\over 3}}{\%} $$"
Q: In a class, the average score of girls in an examination is 73 and that of boys is 71. The average score for the whole class is 71.8. Find the percentage of girls.
1551 05dd62f0ca1c5834595c3d7e9
5dd62f0ca1c5834595c3d7e9- 140 %true
- 250 %false
- 355 %false
- 460 %false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "40 % "
Q: In an election only two candidates A and B contested 30% of the voters did not vote and 1600 votes were declared as invalid. The winner, A got 4800 votes more than his opponent thus he secured 51% votes of the total voters on the voter list. Percentage votes of the loser candidate, B out of the total voters on the voter list is:
1541 0611e121308d7b65efee71f04
611e121308d7b65efee71f04- 13true
- 25false
- 35.6false
- 46.2false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "3"
Q: In two successive year 100 and 75 students of school appeared at the final examination. Respectively 75% and 60 % of them passed. The average rate of pass is:
1520 05ef469cd2d6fc772f50c0dbf
5ef469cd2d6fc772f50c0dbf- 1$$80{1\over2}\%$$false
- 280%false
- 3$$68{4\over7}\%$$true
- 478%false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "$$68{4\over7}\%$$"
Q: If the population of a town is 12.000 and the population increases at the rate of 10% per annum, then find the population. after 3 years.
1511 06426e27c72ca731a990e28e2
6426e27c72ca731a990e28e2- 115,972true
- 212,200false
- 311,200false
- 410,200false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "15,972"
Explanation :
To find the population after 3 years given that it increases at a rate of 10% per annum, you can use the formula for exponential growth:
𝑃=𝑃0×(1+𝑟)𝑛P=P0×(1+r)n
Where:
- 𝑃P = Population after 𝑛n years
- 𝑃0P0 = Initial population
- 𝑟r = Rate of increase (in decimal form)
- 𝑛n = Number of years
Given:
- 𝑃0=12,000P0=12,000 (Initial population)
- 𝑟=0.10r=0.10 (10% increase per annum)
- 𝑛=3n=3 (Number of years)
Substitute these values into the formula:
𝑃=12,000×(1+0.10)3P=12,000×(1+0.10)3
𝑃=12,000×(1.10)3P=12,000×(1.10)3
𝑃=12,000×(1.331)P=12,000×(1.331)
𝑃=15,972P=15,972
So, the population after 3 years would be approximately 15,972.