The mean marks of a group of students is 60. If there marks are 85,62,

1.	The mean marks of a group of students is 60. If there marks are 85,62,36,48,72,x,72,39 find the value of x
Answer» Given: MEAN of given marks is 60. To find: The value of x. Answer: Mean = Sum of all OBSERVATIONS/Total number of observations. Mean = 60 Observations: 85, 62, 62, 36, 48, 72, x, 75, 39 Sum of observations = 85 + 62 + 62 + 36 + 48 + 72 + x + 75 + 39 = 479 + x Total number of observations = 9 Substituting the given values, 60 = 479 + x/9 60*9 = 479 + x 540 = 479 + x x = 540 - 479 x = 61 HOPE THIS HELPS YOU.. MARK ME BRAINLIST..!!

The mean marks of a group of students is 60. If there marks are 85,62,36,48,72,x,72,39 find the value of x

Answer»

Given: MEAN of given marks is 60.

To find: The value of x.

Answer:

Mean = Sum of all OBSERVATIONS/Total number of observations.

Mean = 60

Observations: 85, 62, 62, 36, 48, 72, x, 75, 39

Sum of observations = 85 + 62 + 62 + 36 + 48 + 72 + x + 75 + 39 = 479 + x

Total number of observations = 9

Substituting the given values,

60 = 479 + x/9

60*9 = 479 + x

540 = 479 + x

x = 540 - 479

x = 61

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