arithmetic mean of marks (out of 25 ) scored by 10 students was 15.one of the student named karishma enquired the other 9 students and find the deviations from her marks are noted as -8,-6,-3,-1,0,2,3,4,6.fimd karishma's marks
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If we take Karishma's marks =x
Then,-8+(-6)+(-3)+(-1)+0+2+3+4+6+x/10=15
=x-8-6-3-1+2+3+4+6/10=15
=x-8-10+5+10/10=15
=-8+5+x=150
=-3+x=150
=x=153
Then,-8+(-6)+(-3)+(-1)+0+2+3+4+6+x/10=15
=x-8-6-3-1+2+3+4+6/10=15
=x-8-10+5+10/10=15
=-8+5+x=150
=-3+x=150
=x=153
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