Advertisements
Advertisements
प्रश्न
Find the mean of first six multiples of 4.
उत्तर
First six multiples of 4 are 4, 8, 12, 16, 20, 24
Mean = `"Sum of all observations"/"Total number of observations"`
= `(4 + 8 + 12 + 16 + 20 + 24)/6`
= `84/6`
= 14
Hence, the mean of first six multiplies of 4 is 14.
APPEARS IN
संबंधित प्रश्न
Find the mean of the first five whole numbers.
A cricketer scores the following runs in eight innings:
58, 76, 40, 35, 46, 45, 0, 100
Find the mean score.
Solve any two of the following.
Find the mean of the data given in the following table.
Class | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 |
Frequency | 6 | 4 | 5 | 7 | 3 |
The number of members in the 40 families in Bhilar are as follows:
1, 6, 5, 4, 3, 2, 7, 2, 3, 4, 5, 6, 4, 6, 2, 3, 2, 1, 4, 5, 6, 7, 3, 4, 5, 2, 4, 3, 2, 3, 5, 5, 4, 6, 2, 3, 5, 6, 4, 2. Prepare a frequency table and find the mean of members of 40 families.
The following table shows the electricity (in units) used by 25 families of Eklara village in a month of May. Complete the table and answer the following questions.
Electricity used (units) `bb(x_i)` |
No. of Families (frequency) `bb(f_i)` |
`bb(f_ix_i)` |
30 | 7 | _________ |
45 | 2 | __________ |
60 | 8 | __________ |
75 | 5 | __________ |
90 | 3 | __________ |
N = _________ | `sum f_ix_i` = ______ |
- How many families use 45 units electricity?
- State the score, the frequency of which is 5.
- Find N, and `sum f_ix_i`
- Find the mean of electricity used by each family in the month of May.
Ashish studies for 4 hours, 5 hours, and 3 hours respectively on three consecutive days. How many hours does he study daily on average?
In a class test in mathematics, 10 students scored 75 marks, 12 students scored 60 marks, 8 students scored 40 marks and 3 students scored 30 marks. Find the mean of their score
The average of integers between −10 to 10 is __________
The following are weights (in kg) of 12 people. 70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60. How many people weigh above the mean weight?
The mean age of 25 teachers in a school is 40 years. A teacher retires at the age of 60 years and a new teacher is appointed in his place. If the mean age of the teachers in this school now is 39 years, then the age (in years) of the newly appointed teacher is ______.