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Q:
In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions.
753 0

Answer : 2. "35"

Q:
The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student?
751 0

Answer : 3. "80%"

Q:
If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:
750 0

Answer : 2. "Decreases by 4%"

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.
737 0

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.

Q:
The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights.
735 0

Answer : 1. "20 kg"
Explanation :
Let's denote the weight of A as 𝑥x kg and the weight of B as 𝑦y kg.
Given:
𝑥+𝑦=80x+y=80 (Sum of weights of A and B is 80 kg)
0.5𝑥=56𝑦0.5x=65y (50% of A's weight is 5665 times the weight of B)
We can solve these two equations to find the values of 𝑥x and 𝑦y, and then calculate the difference between their weights.
From equation 2: 0.5𝑥=56𝑦0.5x=65y Multiply both sides by 2 to get rid of the fraction: 𝑥=56𝑦×2x=65y×2 𝑥=106𝑦x=610y 𝑥=53𝑦x=35y
Now substitute this expression for 𝑥x into equation 1: 53𝑦+𝑦=8035y+y=80 83𝑦=8038y=80 Multiply both sides by 3883: 𝑦=80×38y=80×83 𝑦=30y=30
Now that we have found the weight of B, we can find the weight of A using equation 1: 𝑥+30=80x+30=80 𝑥=80−30x=80−30 𝑥=50x=50
So, the weight of A is 50 kg and the weight of B is 30 kg.
Now, let's find the difference between their weights: Difference=Weight of A−Weight of BDifference=Weight of A−Weight of B Difference=50−30Difference=50−30 Difference=20Difference=20
Therefore, the difference between their weights is 20 kg.

Q:
B is 10% more than A. C is 20% less than A. B is what percentage more than C?
727 0

Answer : 3. "37.5%"

Q:
The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?
726 0

Answer : 3. "620"

Q:
If the total monthly income of 16 persons is ₹ 80,800 and the income of one of them is 120% of the average income, then his income is
723 0

Q:
In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions.
753 0

Answer : 2. "35"

Q:
The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student?
751 0

Answer : 3. "80%"

Q:
If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:
750 0

Answer : 2. "Decreases by 4%"

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.
737 0

Q:
The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights.
735 0

Q:
B is 10% more than A. C is 20% less than A. B is what percentage more than C?
727 0

Answer : 3. "37.5%"

Q:
The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?
726 0

Answer : 3. "620"

Q:
If the total monthly income of 16 persons is ₹ 80,800 and the income of one of them is 120% of the average income, then his income is
723 0

Answer : 2. "₹ 6,060 "

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Q: In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions. 753 0602cc7fda6ca4d5b0bb3d76f

Answer : 2. "35"

Q: The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student? 751 0638dd3e09ebad6607b985e0c

Answer : 3. "80%"

Q: If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area: 750 05fed9a2b6ce9586a0ff932f4

Answer : 2. "Decreases by 4%"

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. 737 06426e27c72ca731a990e28e2

Q: The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights. 735 064ccef6ba919c8488e304799

Q: B is 10% more than A. C is 20% less than A. B is what percentage more than C? 727 064225a4b5bff3d098d0b98ea

Answer : 3. "37.5%"

Q: The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number? 726 0631090be7c72c07784688297

Answer : 3. "620"

Q: If the total monthly income of 16 persons is ₹ 80,800 and the income of one of them is 120% of the average income, then his income is 723 063a98b87e590d4085fc68c79

Answer : 2. "₹ 6,060 "

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Q:
In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions.
753 0

Q:
The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student?
751 0

Q:
If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:
750 0

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.
737 0

Q:
The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights.
735 0

Q:
B is 10% more than A. C is 20% less than A. B is what percentage more than C?
727 0

Q:
The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?
726 0

Q:
If the total monthly income of 16 persons is ₹ 80,800 and the income of one of them is 120% of the average income, then his income is
723 0