Let x, y, z be three observations. The mean of these observations is
(a) x×y×z/3
(b) x+y+z/3
(c) x-y-z/3 (d) x×y+z/3

Solution:

Given, the observations are x, y and z.

We have to find the mean of the given observations.

We know, Mean = Sum of all observations/Number of observations

Number of observations = 3

Sum of observations = x + y + z

Mean = x + y + z/3

Therefore, the mean is x + y + z/3.

✦ Try This: Let a, b, c be three observations. The mean of these observations is

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 3

NCERT Exemplar Class 7 Maths Chapter 3 Problem 1

Let x, y, z be three observations. The mean of these observations is (a) x×y×z/3 (b) x+y+z/3 (c) x-y-z/3 (d) x×y+z/3

Summary:

Let x, y, z be three observations. The mean of these observations is x + y + z/3.

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