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
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