Question

In a class test,the mean of the mark secured by four students was 60. Three of them secured 50,72 and 64. How much did the fourth student score?​

Answer 1

$</p><p>\huge\mathcal{\fcolorbox{aqua}{azure}{\red{❖Answer}}} </p><p>$

GIVEN MEAN=60

MARKS SCORED BY STUDENT-50,72,64,X

NOW MEAN= sum of all marks

number of students 50+72+64+x/4-60

-186+x=60x4

-x-240-186

x=54