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 500 2 B 600 4 C 700 8 D 800 12 E 900 10 F 1000 6 G 1100 8 (i) Calculate done mean wages correct to the nearest rupees.
(ii) If the number of workers in each categories double what would be the new mean wage?
The mean of the following data is 16. Calculate the value of f.
Marks No. of students 5 3 10 7 15 f 20 9 25 6