The mean marks obtained by 9 students of class 6 in an exam is 50 among them the marks obtained by 8 students are 60, 40, 50,30,80,40,45 and 40 what is the marks of remaining one student?

65

Step-by-step explanation:

The mean is calculated as

mean =

let x be the mark of the ninth student , then

= 50 , that is

= 50 ( multiply both sides by 9 )

385 + x = 450 ( subtract 385 from both sides )

x = 65

The ninth student has a score of 65

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step-by-step explanation:

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