Average Practice Test 2

Question : 20 of 40

Marks: +1, -0

The strength of 4 sections of class IX is 49, 40 32 and 38. What is the strength of the fifth section if the average strength of 5 sections is 39?

Solution:

Let the strength of 5th section be x.
∴ Total strength

⇒{49+ 40+ 32+ 38+x}/5= 194

⇒{159+x}/x=39

⇒ 159+x =195

⇒x=36

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