Advertisements
Advertisements
प्रश्न
The mean of 5, 9, x, 17 and 21 is 13, then find the value of x
विकल्प
9
13
17
21
Advertisements
उत्तर
13
Explanation;
Hint:
Mean = `(5 + 9 + x + 17 + 21)/5`
13 = `(52 + x)/5`
65 = 52 + x
x = 65 – 52
= 13
APPEARS IN
संबंधित प्रश्न
The mean weight of 4 members of a family is 60 kg. Three of them have the weight 56 kg, 68 kg and 72 kg respectively. Find the weight of the fourth member
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 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
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?
The average of two numbers are 20. One number is 24, another number is ____________
Find the mean of first 10 prime numbers and first 10 composite numbers
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?
The mean of a data is defined as ______.
Mean can never be a fraction.
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 ______.
