Explanation

x² - 9x + 20 = 0  

Factor: (x - 4)(x - 5) = 0  

So x = 4 or x = 5

Larger value = 5

Last verified on 12-05-2026

Explanation

Let the number be x.

Twice the number = 2x

Packets are 4 more than twice:

2x + 4 = 38

Solve:

2x = 38 − 4

2x = 34

x = 17

Last verified on 12-05-2026

Explanation

Find the mean of:

Numbers: 7, 6, 10, 8, 9

Frequencies: 2, 2, 5, 1, 2

Step 1: Multiply each number by frequency

7 × 2 = 14

6 × 2 = 12

10 × 5 = 50

8 × 1 = 8

9 × 2 = 18

Step 2: Sum of products

14 + 12 + 50 + 8 + 18 = 102

Step 3: Total frequency

2 + 2 + 5 + 1 + 2 = 12

Step 4: Mean

Mean = 102 ÷ 12 = 8.5

Last verified on 12-05-2026

Explanation

If 15% discount was given, you paid 85% of the original price.

So 85% of Original = 8500  

0.85 × Original = 8500  

Original = 8500 ÷ 0.85 = 10,000

Last verified on 12-05-2026

Explanation

12.5% = 1/8

640 ÷ 8 = 80

Last verified on 12-05-2026

Explanation

Given:  

Total fixed fee = Rs 750  

Total for 30 cards = Rs 2250  

Processing cost for 30 cards = 2250 - 750 = Rs 1500  

Processing amount for one card = 1500 ÷ 30 = Rs 50

Last verified on 12-05-2026

Explanation

Assume price = 100
After +20% → 120
After −20% → 96

So the final price is less than the original.

Last updated by NA on 23-April-2026

Explanation

Discount = Price × Discount rate  

= 1250 × 18/100  

= 1250 × 0.18  

= 225

Last verified on 13-05-2026

Explanation

Explanation

5x − 15 = 4x + 14

5x − 4x = 14 + 15

x = 29

Last verified on 11-05-2026