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CBSE Class 11-science Answered

The marks scored by Anuvrat in two cycle tests are 64 and 71. Find the minimum marks he should score in the third test to have an average of atleast 65 marks.
Asked by Topperlearning User | 07 Sep, 2017, 11:09: AM
Expert Answer

Here, let us assume that Anuvrat scored x marks in the third test.

Since the average has to be atleast 65 marks and average is sum of observations divided by number of observations, so  average  65.

 

begin mathsize 12px style fraction numerator 64 plus 71 plus straight x over denominator 3 end fraction space greater or equal than space 65
135 plus straight x space greater or equal than 195
straight x space greater or equal than space 60 end style


This means Anuvrat must score minimum 60 marks so as to average 65 marks.

Answered by | 07 Sep, 2017, 01:09: PM
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