Question

14) The mean marks out of 100 of a group of students is 60. If their mars
are 85, 62, 36, 48, 72, p. 75, and 39. Then find the value of p.​

Answer 1

Answer:

63

Step-by-step explanation:

We calculate Mean by calculating the total values / by the no of values

85 , 62 , 36, 48 , 72 , p ,75 , 39

Total 8 different values

mean = 60

so 8 * 60 = 480

the sum of values = 85 , 62 , 36, 48 , 72 ,75 , 39 = 417

the  value of p should be 480 - 417 = 63

Answer 2

Step-by-step explanation:

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

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