The ages of members in a community club are grouped as follows

MATHEMATICS · Subjective · CBSE · Mathematics · Statistics · Statistics

Problem

The ages of members in a community club are grouped as follows. One class frequency is missing.
Age (years)10–2020–3030–4040–5050–60
Number of members611f94
The mean age of the club members is known to be 34.2 years. Determine the missing frequency f, showing each step clearly.

Related theory

Browse the problem library