The percentage of marks obtained by a student in a unit test are given below:
Unit test I II III IV V
% of marks 70 72 65 68 86
What is the probability that the student gets more than 70% marks

\frac{1}{5}

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\frac{2}{5}

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\frac{3}{5}

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Solution

The correct option is C $\frac{2}{5}$
$\Rightarrow$ Total number of Unit test = $5$
$\Rightarrow$ Number of Unit test at which student get marks more than $70 %$ = $2$ .
$∴$ The probability that the student gets more than $70 %$ marks = $\frac{2}{5}$

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Similar questions

Unit test:	I	II	III	IV	V
Percentage of marks obtained:	69	71	73	68	76

The percentage of marks obtained by a student in monthly unit tests are given below:

$\begin{matrix} unit test & I & I I & I I I & I V & V Percentage of marks obtained & 69 & 71 & 73 & 68 & 76 \end{matrix}$

Find the probability that the student gets:

(i) more than 70% marks (ii) less than 70% marks (iii) a distinction.

Test	$I$	$I I$	$I I I$	$I V$	$V$
Percentage marks obtained	$69$	$71$	$73$	$69$	$74$

70 %

The percentages of marks obtained by a student in six unit tests are given below:

If a test is selected at random then, the probability that the student gets more than 60% marks in the test is

Unit Test	$I$	$I I$	$I I I$	$I V$	$V$	$V I$	$V I I$	$V I I I$	$I X$	$X$
Marks obtained (%)	$89$	$93$	$98$	$99$	$98$	$97$	$96$	$90$	$98$	$99$

95

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