Explanation

Profit = 140 - 100 = 40

Profit % = (40/100) × 100 = 40%

Last verified on 20-10-2026

Explanation

SP = CP × (100% - Loss%)

SP = 1200 × 0.90 = Rs 1,080

Last verified on 20-10-2026

Explanation

CP of 15 = SP of 10

Let CP of 1 item = 1

Then CP of 15 items = 15

SP of 10 items = 15

SP of 1 item = 15/10 = 1.5

Profit = 1.5 - 1 = 0.5

Profit % = 0.5 x 100 = 50% profit

Last verified on 20-10-2026

Explanation

• Selling Price (SP) = $2400
• Profit = 20%
• SP = 120% of the Cost Price (CP)

Explanation

Let marker = M and pen = P.

Equation 1:
3M + P = 245

Equation 2:
3M + 3P = 345

Subtract Equation 1 from Equation 2:

3P − P = 345 − 245
2P = 100
P = 50

Now:

3M + 50 = 245
3M = 195
M = 65

Explanation

Loss = 9,000 − 8,000 = 1,000

Loss % = (Loss ÷ Cost Price) × 100

= (1,000 ÷ 9,000) × 100

= 11.11%

Explanation

Given:

Cost Price (CP) = Rs. 1,000

Selling Price (SP) = Rs. 900

Loss = CP − SP

= 1000 − 900 = Rs. 100

Loss % = (Loss ÷ CP) × 100

= (100 ÷ 1000) × 100

= 10%

Explanation

Cost of 1 pen = 250 ÷ 5 = Rs. 50

Cost of 8 pens = 50 × 8 = Rs. 400

Explanation

Formula: Amount = Principal _ (1 + r/100)^n

Given:

Amount = 1.44 _ Principal

n = 2 years

Put values:

1.44 _ P = P _ (1 + r/100)^2

Cancel P from both sides:

(1 + r/100)^2 = 1.44

Take square root both sides:

1 + r/100 = 1.2

r/100 = 1.2 - 1 = 0.2

r = 0.2 * 100 = 20

Last verified on 02-09-2026

Explanation

Cost Price (CP) = Rs. 800
Selling Price (SP) = Rs. 1,000

Gain = SP − CP

$$=1000-800=200$$

Gain % = (Gain ÷ CP) × 100

$$=$$200/800​×100

=25%

Last updated by NA on 09-0-2026