Explanation

If 20% of the students are girls, then the remaining percentage (100% - 20% = 80%) represents the boys.

So, in a class of 40 students:

80% of 40 = (80/100) * 40 = 0.8 * 40 = 32

Therefore, there are 32 boys in the class.

Explanation

We are given:

220% of X = 44  

→ (220/100) × X = 44  

→ (11/5) × X = 44  

→ X = 44 × (5/11) = 20

Now, find 44% of X:

→ (44/100) × 20 = 8.8

Explanation

3.5% of 59000

= (3.5/100) × 59000

= 2065

Explanation

2% of 66 = (2/100) × 66 = 1.32

Explanation

total students = 25

failed = 4

passed students = 25-4 = 21

percentage of pass = 25 is (100%)

failed percentage = 25÷4 = 6.2 %

passed percentage is = 21/25 × 100 = 84%

Explanation

Given:  

Discount = 20%  

Selling Price (after discount) = Rs. 70  

We need to find the Marked Price.

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Step-by-step solution:

Let Marked Price = x

After 20% discount, the customer pays 80% of the marked price.

So,  

80% of x = 70

Convert to equation:  

(80/100) × x = 70  

⇒ (4/5) × x = 70

Multiply both sides by 5:  

4x = 350

Now divide both sides by 4:  

x = 350 ÷ 4 = 87.5

Marked Price = Rs. 87.50

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Explanation

60% of total = 420 → total x = 420 ÷ 0.6.

Hence, total oranges = 700.

Explanation

75% had at least one lunch → 25% had none.

25% × 96 = 24 people ate neither.

Explanation

A number divisible by 7, 11 and 13:

= LCM of 7, 11 and 13

= 1001

A number which is multiple of 1001 is of the form:

Xyz xyz …….. (digits repeating)

Answer: 624624

Explanation

f the ratio of Cost Price (CP) to Selling Price (SP) is 4:5, it means:

- CP = 4 units  

- SP = 5 units  

Profit = SP − CP = 5 − 4 = 1 unit

Profit % = (Profit / CP) × 100  

= (1 / 4) × 100  

= 25%