Question

The blood groups of 30 students are recorded as follows:

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

Prepare a frequency distribution table for the data.

Answer 1

The number of students who have a certain type of blood group is called the frequency of those blood groups.

A frequency distribution table for the given data is given below:

Blood group	Tally marks	Number of students (Frequency)
A	`\cancel(bb|bb|bb|bb|)` `\cancel(bb|bb|bb|bb|) bb|bb|`	12
B	`\cancel(bb|bb|bb|bb|) bb|bb|bb|`	8
AB	`bb|bb|bb|bb|`	4
O	`\cancel(bb|bb|bb|bb|) bb|`	6
Total		30