Mathematics
A life insurance agent found the following data of age distribution of 100 policy holders, where f is an unknown frequency.
| Age in years | No. of policy holders |
|---|---|
| 15-20 | 7 |
| 20-25 | 12 |
| 25-30 | 15 |
| 30-35 | 22 |
| 35-40 | f |
| 40-45 | 14 |
| 45-50 | 8 |
| 50-55 | 4 |
(a) If the mean age of the policy holders is 35.65 years, find the unknown frequency f.
(b) Find the median class of the distribution.
Related Questions
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(Use a ruler and a compass for this question.)
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