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Q.

53, 75, 42, and 70 are marks obtained by 4 students is statistics. What is the arithmetic mean of their marks?


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a

42

b

64

c

60

d

56 

answer is C.

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Detailed Solution

It is given that 4 students got 53, 75, 42, and 70 marks in statistics. We need to find the arithmetic mean of their marks.
The formula of mean is =Sum of observationsNumber of observations .
On substituting the numbers in the formula, we get
=53+75+42+704 =2404
=60 Thus, the mean of the marks is 60.
Therefore, the correct option is 3.
 
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53, 75, 42, and 70 are marks obtained by 4 students is statistics. What is the arithmetic mean of their marks?