Explanation

Let's calculate the population after 2 years:

Year 1:

Population = 50,000 + (4% of 50,000)

= 50,000 + 0.04 * 50,000

= 50,000 + 2,000

= 52,000

Year 2:

Population = 52,000 + (4% of 52,000)

= 52,000 + 0.04 * 52,000

= 52,000 + 2,080

= 54,080

The population after 2 years will be 54,080.

Explanation

Half of 1 percent is:

(1/2) x 1% = (1/2) x 0.01 = 0.005

Explanation

Students passed in English = 80%

Students passed in Math's = 85%

Students passed in both subjects = 73%

Then, the number of students who passed at least one subject

= (80+85)-73

= 92%.

[The percentage of students who passed in English and Maths individually, has already included the percentage of students who passed in both subjects. So, We are subtracting the percentage of students who have passed both subjects to find out the percentage of students who at least passed one subject.]

Thus, students failed in both subjects = 100-92 = 8%.

Explanation

To find 12% of 625:

12% of 625 = 0.12 * 625

= 75

Now, subtract 75 from 625:

625 - 75 = 550

Explanation

To find the value-added tax (VAT), we need to calculate the tax paid and charged, then find the difference.

Step 1: Calculate the tax paid on purchase

Tax paid = 5% of Rs. 52900 = 0.05 * 52900 = Rs. 2645

Step 2: Calculate the tax charged on sale

Tax charged = 7% of Rs. 53500 = 0.07 * 53500 = Rs. 3745

Step 3: Calculate the value-added tax (VAT)

VAT = Tax charged - Tax paid = Rs. 3745 - Rs. 2645 = Rs. 1100

Explanation

If the tank is 40% filled, then the remaining part, which is empty, is 100% - 40% = 60%.

Therefore, 60% of the tank is empty.

Explanation

 Calculate the discount amount:

Original Price - Selling Price = Discount

$1500 - $1200 = $300

Calculate the discount percentage:

(Discount / Original Price) * 100%

($300 / $1500) * 100%

0.20 * 100% = 20%

Explanation

To find the profit percentage:

Cost Price (CP) = 560

Selling Price (SP) = 600

Profit = SP - CP

= 600 - 560

= 40

Profit percentage = (Profit / CP) * 100

= (40 / 560) * 100

= 7.14%

Explanation

Explanation

25% of x = 150

0.25x = 150

x = 150 / 0.25

x = 600