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Q.

What is the average of $80, 90, 100, 110, 120, 130$ ?

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a

100

b

105

c

110

d

115

answer is B.

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Detailed Solution

Given numbers are

80, 90, 100, 110, 120

and

130

.
The formula of average is

= \frac{Sum of observations}{Number of observations}

.
On substituting the numbers in the formula, we get
Average

= \frac{80 + 90 + 100 + 110 + 120 + 130}{6}

= \frac{630}{6}

= 105

Thus, the average of the given numbers is 105.
Therefore, the correct option is 2.

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What is the average of 80,90,100,110,120,130?