Question

Please help me with this.

Answer 1

are ye to easy hai....

1) 60 marks=4 class

p(E) = total Mark's with 60% up/total class

=4/5

2)Mark's btwn 70 to 80 = 2

p(E)= total Mark's between 70 to 80 /total class

= 2/5

3)75% above= 2

p(E)= above 75%Mark's/total class

=2/5

4)less than 65 Mark's =2

p(E) = less then 65 marks/total class

=2/5