Question : Of the three numbers whose average is 40, the first is
Option 1: 20
Option 2: 50
Option 3: 25
Option 4: 30
Correct Answer: 30
Solution :
Let the numbers be
Their average is 40.
Sum =
and given that
⇒
Putting the value of
⇒
⇒
Hence, the correct answer is 30.
SSC CGL Complete Guide
Candidates can download this ebook to know all about SSC CGL.