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- Quantitative Aptitude
4.Average
easy
The average marks of a group of $20$ students on a test is reduced by $4$ when the topper who scored $90$ marks is replaced of a new students. Find the marks of the new student.
A
$10$
B
$51$
C
$56$
D
$86$
Solution
Let the marks of New student $= x$
$x=90-20 \times 4 \Rightarrow x=80$
Marks of New student $= 10$
Standard 13
Quantitative Aptitude