Mathematics
Find the mean age in years from the frequency distribution given below :
| Age in years | No. of persons |
|---|---|
| 25 - 29 | 4 |
| 30 - 34 | 14 |
| 35 - 39 | 22 |
| 40 - 44 | 16 |
| 45 - 49 | 6 |
| 50 - 54 | 5 |
| 55 - 59 | 3 |
Related Questions
The heights of 50 children were measured (correct to the nearest cm) giving the following results :
Height (in cm) No. of children 65 1 66 4 67 5 68 7 69 11 70 10 71 6 72 4 73 2 Calculate the mean height for this distribution correct to one place of decimal.
Find the value of p, if the mean of the following distribution is 18.
Variate (x) Frequency (f) 13 8 15 2 17 3 19 4 20 + p 5p 23 6 The mean of the following frequency distribution is 62.8. Find the value of p :
Classes Frequency 0 - 20 5 20 - 40 8 40 - 60 p 60 - 80 12 80 - 100 7 100 - 120 8 The daily expenditure of 100 families are given below. Calculate f1 and f2, if the mean daily expenditure is ₹188.
Expenditure (in ₹) No. of families 140 - 160 5 160 - 180 25 180 - 200 f1 200 - 220 f2 220 - 240 5