Mathematics
Find the mean for the following distribution by short cut method:
| Numbers | Cumulative Frequency |
|---|---|
| 60 | 8 |
| 61 | 18 |
| 62 | 33 |
| 63 | 40 |
| 64 | 49 |
| 65 | 55 |
| 66 | 60 |
Related Questions
Find the mean of the following distribution :
Number Frequency 5 1 10 2 15 5 20 6 25 3 30 2 35 1 The contents of 100 matchboxes were checked to determine the number of matches they contained.
No. of matches No. of boxes 35 6 36 10 37 18 38 25 39 21 40 12 41 8 (i) Calculate, correct to one decimal place, the mean number of matches per box.
(ii) Determine how many extra matches would have to be added to the total contents of the 100 boxes to bring the mean upto exactly 39 matches.
Category Wages in ₹ per day No. of workers A 50 2 B 60 4 C 70 8 D 80 12 E 90 10 F 100 6 G 110 8 (i) Calculate the mean wage, correct to nearest rupee.
(ii) If the number of workers in each category is doubled, what would be the new mean wage?
If the mean of the following distribution is 7.5, find the missing frequency f :
Variate Frequency 5 20 6 17 7 f 8 10 9 8 10 6 11 7 12 6