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Grouped Frequency Table

In a blood do...

Question

In a blood donation camp following was the observation of 15 people's blood group. A, B, AB, A, B, A, A, B, O, A, AB, B, A, B, AB. Make an ungrouped frequency distribution and find the rarest blood group.

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Solution

$\begin{matrix} B L O O D G R O U P & F R E Q U E N C Y A & 6 B & 5 A B & 3 O & 1 T O T A L & 15 \end{matrix}$

Rarest blood group is O since its frequency is least

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Q. In a blood donation camp following was the observation of 15 people's blood group:
A, B, AB, A, B, A, A, B, O, A, AB, B, A, B, AB
Make an ungrouped frequency distribution and find the rarest blood group.

Q. The blood group of 20 donors participated in blood donation camp are: A-, AB+, O-, O+, A-, A+, AB-, AB-, O-, O+, O-, A-, A+, AB+, O-, AB+, A+, B-, B+, B+

What is the mode of given data set ?

Q. 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.
By representing this data in a frequency distribution table, find out the most common and the rarest blood group among these students.

Q. The blood groups of the persons who had donated blood at a blood donation camp are as follows:

\begin{matrix} A & AB & O & B & AB & A & B & A & A & A \\ A & B & O & O & O & B & O & AB & A & AB \\ O & A & O & B & A & B & A & O & O & B \end{matrix}

Use this information to complete the table below.

Blood group	Tally marks	Frequency
A
B
AB
O

(1) Which blood group has the least number of donors?
(2) Which blood group has the most donors?
(3) How many donors are of the 'B' blood group?
(4) What was the total number of donors at the camp?

Q. A person whose blood group is AB can donate blood to a person with blood group

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