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4.Average
medium
Of the three numbers whose average is $60,$ the first is one-fourth of the sum of the others. The first number is
Solution
Let the First $no = x$
Sum of the other numbers $=4 x$
According to the question
$\frac{x+4 x}{3}=60 \Rightarrow 5 x=180 \Rightarrow x=36$
Std 13
Quantitative Aptitude
