Question

50
50℅ of students passed in maths 70℅of students passed in science while 10℅ of students failed in both subject 300 students passed in both subject find the total number of students who appeared in the
examination if they took examination in only two subjects

Answer 1

Answer:

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Answer 2

Answer:

total number of student=100%

passed students=100-10

=90

total number passed in a least sub = (50+70)-90

=120-90

=30%

30%of student total passed in a least one sub

(x*30)/100=300

30x=300*100

30x=30000

x=30000/30

x=1000