the mean marks (out of 100) of a group of students is 60, if their marks are 85, 62, 62, 36, 48, 72, x,75 and 39. Then find the value of x
Answers
Mean is the average of a given set of data.
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 it helps :)
Mean is the average of a given set of data.
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 it helps :)