Mathematics
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 |
Related Questions
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 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?
Marks obtained by 40 students in a short assessment is given below, where a and b are two missing data :
Marks No. of students 5 6 6 a 7 16 8 13 9 b If the mean of the distribution is 7.2, find a and b.
Calculate the mean of the following distribution:
Class interval Frequency 5 - 15 2 15 - 25 6 25 - 35 4 35 - 45 8 45 - 55 4