Question

mean of y-2a y-a y y+a y+2a is​

Answer 1

Mean of y-2a, y-a, y, y+a, y+2a is y

Step-by-step explanation:

Given: y-2a, y-a, y, y+a, y+2a

Find: The mean

Solution:

Mean = Sum of observations / Number of observations

     = y-2a + y-a + y + y+a + y+2a / 5 Grouping the y and a together, we get:

     = 5y -3a + 3a / 5

     = 5y + 0 / 5

     = 5y/ 5

Mean = y

Answer 2

Step-by-step explanation:

Given that:y-2a,y-a,y,y+a,y+2a

To find: Mean

Solution:

We know that formula of mean

$\bold{\green{Mean = \frac{Sum \: of \: all \: observation}{Total \: observation}}}$

Observation/Data= y-2a,y-a,y,y+a,y+2a

Number of observation= 5

$Mean = \frac{y - 2a + y - a + y+y + a + y + 2a}{5} \\ \\ Mean = \frac{5y - 3a + 3a}{5} \\ \\ Mean= \frac{5y}{5} \\ \\ Mean = \frac{ \cancel5 \: y}{\cancel5} \\ \\ \bold{Mean = y}$

Mean of given data is y.

Hope it helps you.

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