The mean of 12+x,14+2x,16,18+x, 20,22-x and 24-3x is :
Answers
Answer:
18
Step-by-step explanation:
ean = sum of all data / total no. of all data
Mean =
\begin{gathered}\frac{12 + x + 14 + 2x + 16 + 18 + x + 20 + 22 - x + 24 - 3x}{7} \\ \\ = \frac{126 + 4x - 4x}{7} \\ \\ = \frac{126}{7} \\ \\ = 18\end{gathered}
7
12+x+14+2x+16+18+x+20+22−x+24−3x
=
7
126+4x−4x
=
7
126
=18
Hence the answer is option (b) 1
Given : 12+x,14+2x,16,18+x, 20,22-x and 24-3x
To Find : Mean
Solution:
Mean = Sum of all observations / number of observation
12 + x
14 + 2x
16
18 + x
20
22 - x
24 - 3x
______
126 + 4x - 4x = 126
Sum of all observations = 126
Number of observation = 7
Mean = 126/7 = 18
The mean of 12+x,14+2x,16,18+x, 20,22-x and 24-3x is : 18
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