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# 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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