Question

The blood groups of 30 students of Class VIII are recorded as follows:
ABOO, AB, O, A.O,B,A,O,B,A,O. O,
A.AB, O, A,A, 0, 0.AB,B,A,O, B, A, B, O.​

Answer 1

$\sf\color{navy}{The \: frequency \: is \: represented \: in \: the \: frequency \: distribution \: table\:as:}$

$\tiny\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\boxed{\begin{array}{cccc}\sf Blood\:Group &\sf Tally\:Marks&\sf Number \: of \: Students \: (Frequency) \\\frac{\qquad \qquad \qquad \qquad}{}&\frac{\qquad \qquad \qquad \qquad}{}&\frac{\qquad \qquad \qquad \qquad\qquad}{}\\\sf A&\sf ƗƗƗƗ\:IIII &\sf 9 \\\\\sf B &\sf ƗƗƗƗ\:I &\sf 6 \\\\\sf O&\sf ƗƗƗƗ\:ƗƗƗƗ\:II&\sf 12 \\\\\sf AB&\sf III&\sf 3\\\\\ \\\ \sf Total &\sf &\sf 30\\\frac{\qquad \qquad \qquad \qquad}{}&\frac{\qquad \qquad \qquad \qquad}{\bf{}}&\frac{\qquad \qquad \qquad \qquad\qquad}{}\end{array}}\end{gathered}\end{gathered}\end{gathered} \end{gathered}\end{gathered}$