In an examination 1100 boys and 900 girls appeared, 50% of the boys and 40% of the girls passed. The fail percentage is

A: 54.5 %  

B:45.5 %

C: 45%

D: 60.5%

Solution:

No of boys= 1100

No of girls= 900

50 % of boys = 50/100 * 1100=550

40% of girls=40/100 *900=360

Therefore out of 2000 students

(550-360) passed the exam therefore out of 2000, 910 students passed

Now

Percent of candidates failed=2000-910/2000 *100

1090/2000 * 100

109/2

54.5 % Ans