Advertisements
Advertisements
Question
The mean of first fifteen even numbers is ____________
Options
4
16
5
10
Advertisements
Solution
16
Explanation;
Hint:
`(2 + 4 + 6 + .... + 30)/15 = (2[1 + 2 + 3 + .... 15])/15`
= `2 xx 120/15`
= 16
APPEARS IN
RELATED QUESTIONS
The mean of 5 observations is 50. One of the observations was removed from the data, hence the mean became 45. Find the observation which was removed.
Two vessels contain 20 liters and 60 liters of milk respectively. What is the amount that each vessel would have if both share the milk equally?
A batsman scored the following number of runs in six innings: 36, 35, 50, 46, 60, 55. Calculate the mean runs scored by him in an inning.
If the mean of the following data is 20.2, then find the value of p
| Marks | 10 | 15 | 20 | 25 | 30 |
| No. of students | 6 | 8 | p | 10 | 6 |
The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the maximum mark obtained
The mean height of 11 students in a group is 150 cm. The heights of the students are 154 cm, 145 cm, Y cm, Y + 4 cm, 160 cm, 151 cm, 149 cm, 149 cm, 150 cm, 144 cm and 140 cm. Find the value of Y and the heights of two students?
Find the mean of first 10 prime numbers and first 10 composite numbers
Let x, y, z be three observations. The mean of these observations is ______.
If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is ______.
Calculate the Mean, Median and Mode of the following data:
5, 10, 10, 12, 13.
Are these three equal?
