Class 9

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Q1.

The following frequency distribution table shows the blood groups of $30$ students of a class. Use this table to determine the probability that a student of this class,selected at random,has blood group $AB$.

Blood group	Number of students
$A$	$9$
$B$	$6$
$AB$	$3$
$O$	$12$
Total	$30$

(A)

$\frac{10}{15}$

(B)

$\frac{1}{25}$

(C)

$\frac{1}{10}$

(D)

$\frac{1}{15}$

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Q2.

$A$ die is thrown $1000$ times and the outcomes were recorded as follows:

Outcome	$1$	$2$	$3$	$4$	$5$	$6$
Frequency	$180$	$150$	$160$	$170$	$150$	$190$

If the die is thrown once more,then the probability that it shows $5$ is:

(A)

$\frac{3}{20}$

(B)

$\frac{9}{50}$

(C)

$\frac{4}{25}$

(D)

$\frac{7}{25}$

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