Advertisements
Advertisements
Question
The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is
Options
24
36
26
34
Solution
34
Explanation;
Hint:
Mean = 28
a + b + c + d + e = 28 × 5 = 140
= 140 ...(1)
But `("a" + "c" + "e")/3` = 24
a + c + e = 72
a + b + c + d + e = 140
b + d + 72 = 140
b + d = 140 – 72
= 68
Mean = `68/2`
= 34
APPEARS IN
RELATED QUESTIONS
Solve any two of the following.
In some families in a colony the daily purchase of milk in litre is 1, 3, 2, 2, 4, 1, 2, 2, 1. Find the mean, median and mode of daily purchase of milk.
The` "n"^(th)` term of the A. P. 3, 8, 13, 18, ............ is 148. Find n
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?
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 mean of first ten natural numbers is ____________
The average of two numbers are 20. One number is 24, another number is ____________
The mean of three numbers is 40. All the three numbers are different natural numbers. If lowest is 19, what could be highest possible number of remaining two numbers?
Mean can never be a fraction.
The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the mean
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 ______.
