5. The percentage of marks obtained by a student in monthly unit tests are given below: Based on this data find the probability that the student gets.(iii) less than $65%$ marks in a unit test.

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5. The percentage of marks obtained by a student in monthly unit tests are given below: Based on this data find the probability that the student gets.(iii) less than $65%$ marks in a unit test.

Given table in the question is as follows:

Unit Test	$I$	$II$	$III$	$IV$	$V$	$VI$
Percentage of marks obtained	$72$	$67$	$69$	$74$	$71$	$76$

(iii)

The total number of times students get less than $65%$ marks in a unit test $=0$

Now,

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)

$=0/6$

$=0$

i

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