The blood groups of $30$ students of Class VIII are recorded as follows: $A, B, O, O, A B, O, A, O, B, A, O, B, A, O, O, A, A B, O, A, A, O, O, A B, B, A, O, B, A, B, O .$
Represent this data in the form of a frequency distribution table.
Which is the most common, and which is the rarest, blood group among these students?

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Solution

frequency distribution : A frequency distribution is a representation, either in a graphical or tabular format, that displays the number of observations within a given interval.
It can be observed that $9$ students have their blood group as $A$ , $6$ as $B$ , $3$ as $A B$ , and $12$ as $O$
Therefore the blood group of $30$ students of the class can be represented as follows:
Blood group Tally marks Frequency
$A$ $| | | | | | | |$ $9$
$B$ $| | | | |$ $6$
$A B$ $| | |$ $3$
$O$ $| | | | | | | | | |$ $12$
Total $30$

Hence, The frequency distribution table for the data is the above table.
From the observation of the above table,
The highest frequency is $12$ which is for the blood group $O$ and the least frequency is $3$ which is for the blood group $A B$
Hence,
The most common blood group (highest frequency blood group) is $O$
The rarest blood group (least frequency blood group) is . $A B$

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Similar questions

The blood groups of $30$ students of Class VIII are recorded as follows:
$A, B, O, O, A B, O, A, O, B, A, O, B, A, O, O,$
$A, A B, O, A, A, O, O, A B, B, A, O, B, A, B, O$ .
Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?

Question 1
The blood groups of 30 students of Class VIII are recoded as follows:
A,B, O, O,AB,O,A,O,B, A, O, B,A,O, O, A,AB, O, A, A, O,O, AB, B,A,O, B,A,B,O.
Represent this data in the form of frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?

the blood groups of 30 students of class VIII are recorded as follows:

A, B, O, O, AB, O, A, O, B, A,

O, B, A, O, O, A, AB, O, A, A,

O, O, AB, B, A, O, B, A, B, O

Represent this data in the form of a frequency distribution table. Find out which is the most common and which is the rarest blood group among these students

Q. The blood groups of 30 students of a class are recorded as under:
A, B, O, O, AB, O, A, O, A, B, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O.
(i) Represent this data in the form of a frequency distribution table.
(ii) Find out which is the most common and which is the rarest blood group among these students.

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Blood group	Tally marks	Frequency
$A$	$\| \| \| \| \| \| \| \|$	$9$
$B$	$\| \| \| \| \|$	$6$
$A B$	$\| \| \|$	$3$
$O$	$\| \| \| \| \| \| \| \| \| \|$	$12$
Total		$30$

The blood groups of 30students of Class VIII are recorded as follows:A,B,O,O,AB,O,A,O,B,A,O,B,A,O,O,A,AB,O,A,A,O,O,AB,B,A,O,B,A,B,O.Represent this data in the form of a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?