In an examination, 45% of the students qualified and 79750 are not qualified. How many students appeared for the examination?

Correct option is A

Given:

Percentage of students who qualified = 45%
Number of students who did not qualify = 79,750

Solution:

Total students = 100%

Not qualified = Total student - Qualified

Not qualified = 100% - 45%

Not qualified = 55%

55% = 79,750

1% = $$\frac{79750}{55}$$

1% = 1450

Then, 

100% = 1,45,000

So, 1,45,000 students appeared for the examination.

Thus, the correct answer is (a).