The percentage of marks obtained by a student in monthly unit tests are given below: Unit I II III IV V Percentage of marks obtained 69 71 73 68 76 Find  the probability that the student gets: more than 70% marks less than 70% marks      (iii)  a distinction

Explanation

(i)The student gets more than 70% marks in 3 unit tests out of 5 unit tests.

`therefore`P(getting more than 70% marks)= `3/5=0.6`
(ii) The student gets less than 70% marks in 2 unit tests out of 5 unit tests.

`therefore`P(getting less than 70% marks)= `2/5=0.4`
(iii)The students Gets a distinction in test(76%)
`therefore`P(a distinction)=`1/5=0.2`