Explanation

Explanation

“European” starts with a vowel letter but a /juː/ sound, so “a” is correct

Explanation

Satellite

سیٹلائٹ

Explanation

If a constant is added to each value, the mean increases by that constant.

New mean = 6 + 3 = 9.

Explanation

 The unit "poise" (symbolized as P) is a CGS (centimeter-gram-second) unit of dynamic viscosity,

It also known as absolute viscosity, named after French physician Jean Louis Marie Poiseuille. 

Explanation

⇒ Number of girls = 20

⇒ Number of boys = 15

The ratio of girls to boys: ⇒ Girls: Boys = 20:15

⇒ Girls: Boys = 20 ÷ 5: 15 ÷ 5 ⇒ Girls: Boys = 4:3

Explanation

 Anaerobic Organisms: Anaerobic organisms, including certain bacteria, are those that do not require oxygen for growth and survival. 

Oxygen Toxicity: Some anaerobic bacteria are highly sensitive to oxygen and cannot tolerate its presence, while others can tolerate small amounts of oxygen. 

Explanation

Iris is online portal where Income Tax Return is filed.

Explanation

Calculate the sum of the numbers. 34+44+56+78=212

Divide the sum by the total count of numbers.

There are 4 numbers. 212/4=53

Explanation

30% of x = 21 → (30/100) × x = 21 → x = 21 × (100/30) = 70

Now find what percent 49 is of 70: (49 / 70) × 100 = 70%