Question

in an examination,80 % students passed in physics, 70% in chemistry while 15% failed in the both the subject. if 325 students passed in both the subject. find the total number of students who appeared in the examination.​

Answer 1

80-70=10

10/100*x=325

10*x=325*100

10x=32500

x=32500/10

x=3250

By 15%

15/100*3250

487.5

so

total

325+487.5

=812.5