| Unit Test | I | II | III | IV | V | VI |
| Percentage of marks obtained by students | $72$ | $67$ | $69$ | $74$ | $71$ | $76$ |
(iii) less than $65%$marks in a unit test.
Answer-
Probability – the chances of something happening.
(iii)
The total number of times that the students who get less than 65% marks in a unit test = $0$
Then,
$P($less than $65%$ marks in a unit test$)$
= (Number of times student gets less than $65%$marks in a unit test)/(total
number of tests taken by a student$)$
= $\frac{0}{6}$
= $0$
Dividing Any number by zero, the only answer we get is zero