Question

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 a frequency distribution table. Which is the most common, and which is the rarest, blood group among these students?

Answer 1

Provided the frequency distribution table in the given attachment -

As you can see in the attachment-

Blood group in the First column

Tally in the Second column

A number of students in the Third column.

Number of students with "A" group = 9

Number of students with "B" group = 6

Number of students with "AB" group = 3

Number of students with "O" group = 12

Total number of students -

= 9 + 6 + 3 + 12 = 30

Finding Most common Blood Group -

Most common Blood Group is the blood group with the maximum number of students = "O"

Finding Rarest Blood Group -

Rarest Blood Group is the blood group with a minimum number of students. = "AB".