Explanation

In Pakistan, airport security is primarily the responsibility of the Airports Security Force (ASF), which operates under the Ministry of Defence.

The ASF is tasked with safeguarding airports, facilities, and aircraft against unlawful interference. 

Explanation

Let's break down the problem step by step:

Step 1: Express the initial number of boys and girls using the given ratio

Let the number of boys be 11x and the number of girls be 13x.

Step 2: Calculate the new number of boys and girls after 4 boys and 8 girls join the class

New number of boys = 11x + 4

New number of girls = 13x + 8

Step 3: Set up the equation based on the new ratio

Given the new ratio is 4:5, we can write the equation as:

(11x + 4) / (13x + 8) = 4/5

Step 4: Solve the equation

Cross-multiplying gives us:

5(11x + 4) = 4(13x + 8)

55x + 20 = 52x + 32

55x - 52x = 32 - 20

3x = 12

x = 4

Step 5: Calculate the strength of the class

Strength of the class = Initial number of boys + Initial number of girls + New boys + New girls

= 11x + 13x + 4 + 8

= 24x + 12

= 24*4 + 12

= 96 + 12

= 108

Explanation

Signal jammers block or interfere with radio frequencies to stop communication.

They are used for security or preventing unauthorized transmissions.

Explanation

SIFC: Special Investment Facilitation Council

Formation: 17th June, 2023

Founded by: Shahbaz Sharif

Headquarter: Islamabad

Purpose: Economic revival of Pakistan, attract Foreign Direct Investment

Explanation

Wireless communication allows quick, remote data transfer without physical connections.

It's commonly used by agencies for mobility, flexibility, and real-time communication.

Explanation

"Twenty kilometres" is treated as a singular unit of distance.

Therefore, it takes a singular verb — "is" — to match the singular subject meaning.

Explanation

FIA (Federal Investigation Agency) and ANF (Anti-Narcotics Force) are deployed at airports for immigration and anti-drug operations.

Inland Revenue handles taxation and is not involved in airport operations.

Explanation

The object "my help" becomes the subject in passive voice.

The verb changes to "is needed," and the subject "she" becomes "by her."

Explanation

Prime number: A prime number is a number that can be divided only by one and the number itself.

Example - 2, 3, 5, ..etc.

Formula used:

The arithmetic mean = Sum of all terms/ Number of terms

Calculation:

According to the question,

First 10 prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

The arithmetic mean = (2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29)/10

⇒ 129/10 = 12.9

The arithmetic mean of the first ten prime numbers is 12.9.

Explanation

Use the formula:

% decrease = (increase ÷ (100 + increase)) × 100

= (25 ÷ 125) × 100 = 20%

So, to keep the total expenditure the same, consumption must decrease by 20%.