The average of 6.5, 10.7, 20.2
The average of 6.5, 10.7, 20.2 and a is 15. The value of a is:
6.5, 10.7, 20.2 और a का औसत 15 है। a का मान क्या होगा ?
Detailed Solution & Logic
Correct Answer:
22.6
The average of 6.5, 10.7, 20.2 and $a$ is 15.
Step 1: Use the formula of average
$ \text{Average} = \frac{\text{Sum of observations}}{\text{Number of observations}} $
Here, number of observations = 4.
So,
$ \frac{6.5 + 10.7 + 20.2 + a}{4} = 15 $
Step 2: Simplify
$ 6.5 + 10.7 + 20.2 + a = 60 $
$ 37.4 + a = 60 $
$ a = 60 - 37.4 $
$ a = 22.6 $
Correct Answer: 22.6
Similar Practice Questions
A class of 60 students has an average score of 75.
A class of 60 students has an average score of 75. If 5 new students...
The average of the number 253, 245, 325, 120 and 115+2k is 212
The average of the number 253, 245, 325, 120 and 115+2k is 212. Find the...
The average marks of 14 students in a class is 59. If the marks of each student are doubled, find the new average.
The average marks of 14 students in a class is 59. If the marks of...
The sum of 8 numbers is 720. Find their average.
The sum of 8 numbers is 720. Find their average. 8 संख्याओं का योगफल 720...
What is the average of all numbers between 1000 and 1300 that are divisible by 25?
What is the average of all numbers between 1000 and 1300 that are divisible by...
The average age of 48 students of a class is 22 years.
The average age of 48 students of a class is 22 years. If the age...
The ages of 7 men in a cricket team are 26, 25, 21, 29, 24, 28, and 22. What is their average age?
The ages of 7 men in a cricket team are 26, 25, 21, 29, 24,...