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The mean marks of seven students are 55 the marks of six students are 52,54,55,53,56,54 find the marks of seventh student?
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The mean marks of seven students are 55 the marks of six students are ...
Problem Statement

The mean marks of seven students are 55 and the marks of six students are 52,54,55,53,56,54 find the marks of the seventh student.


Solution

Let the marks of the seventh student be x.

We know that,

Mean of seven students = (Sum of marks of all seven students) / 7

So,

55 = (52+54+55+53+56+54+x) / 7

Simplifying the above equation, we get

385 = 324 + x

x = 385 - 324

x = 61

Therefore, the marks of the seventh student is 61.
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The mean marks of seven students are 55 the marks of six students are 52,54,55,53,56,54 find the marks of seventh student?
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