Arithmatic mean of marks (out if 25) scored by 10 students was15 one of the student named karishma enquired the other 9students and fibf the deviations from her marks are noted as -8,-6,-3,-1,0,2,3,4,6 find karishma's marks
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15.3 as 10x-3/10=15
So x= 15.3
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