Mathematics
The data on the number of patients attending a hospital in a month are given below. Find the average (mean) number of patients attending the hospital in a month by using the shortcut method.
Take the assumed mean as 45. Give your answer correct to 2 decimal places.
| Number of patients | Number of days |
|---|---|
| 10 – 20 | 5 |
| 20 – 30 | 2 |
| 30 – 40 | 7 |
| 40 – 50 | 9 |
| 50 – 60 | 2 |
| 60 – 70 | 5 |
Related Questions
Weights of 60 eggs were recorded as given below :
Weights (in gms) Number of eggs 75 – 79 4 80 – 84 9 85 – 89 13 90 – 94 17 95 – 99 12 100 – 104 3 105 – 109 2 Calculate their mean weight to the nearest gm.
The following table gives marks scored by students in an examination :
Marks Number of students Less than 5 3 Less than 10 10 Less than 15 25 Less than 20 49 Less than 25 65 Less than 30 73 Less than 35 78 Less than 40 80 Calculate the mean marks correct to 2 decimal places.
Calculate the mean of the following frequency distribution.
Class-interval Frequency 5 – 15 2 15 – 25 6 25 – 35 4 35 – 45 8 45 – 55 4 Which of the following is not a measure of central tendency?
Mean
Mode
Range
Median