Explanation

Total Students = X

Fail Student = 45% of X

Pass Student= 550

X x 45% of X = 550

X value is one so 45% of x means .45 so we less one from .45

1 - .55 = 550

X = 550/.55

X = 55000/55

X =1000

Explanation

Ideology=> نظریہ

Explanation

He has always done it, and will always do it.

This sentence maintains correct verb tense consistency:

"has always done it" (present perfect)

"will always do it" (future simple)

The use of "and" connects the two parts smoothly and grammatically.

Explanation

Empirical => تجرباتی/  تجربہ کی بنياد پر

Empirical => something based on testing or experience.

Explanation

Whenever zero comes as an exponent on any number its value becomes 1

Explanation

 Journey expense from A to B = Rs. 15/

Saving = Rs. 10/

Payment for goods =?

Total expense = 15+10 = 25

25 x 10 = 250

So payments for goods = 250-25

225