A candidate score 20% and fail by 50% mark’s while another candidate who score 40% marks, Gate 30 marks more than the minimum required marks to pass the examination. Find the maximum marks for the examination.

Explanation:given that p = 705600, r = 5%, n = 2
According to the formula
Population after n yr
= p (1 + R / 100) n
Population after 2yr
= 705600 x (1 + 5 /100)2
= 705600 x (105 / 100)2
= 705600 x (21 / 20 x 21/ 20) = 777924

15% of the total number of students in a college. Play football. How many students do not play football if the total number of students in the college is 6500?

Veena spends 25% of her monthly income on household expenses. Her annual income is Rs. 4.32 lac. What is the total amount that veena spends on household expenses In 8 months together?

Explanation:annual household expenses
= Rs (25% of 4.32 x 10^{5})
=Rs (25 / 100 x 4.32 x 10^{5} )
=Rs (25 x 4.32 x 10^{3})
Hushold expenses for 8 months
=Rs (25 x 4.32 / 12 x 8 x 10^{3})
= Rs 72000