The mean of the first five odd multiples of 5 is:

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answer is B.

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Detailed Solution

Concept- Record the first ten multiples of five first, then the first five odd multiples of five. Then, since the summation was done with five values, we can simply take the sum of the first five multiples of 5 and divide it by 5 to determine their mean.
The first 10 multiples of 5 will be written down.
They are 5,10,15,20,25,30,35,40,45,50.
In this case, the first five odd multiples are 5, 15, 25, 35, and 45.
Since we know the first five odd multiples of 5, we can calculate its mean. We must first determine the sum of the multiples before we can determine its mean.

is the total of their numbers.
We now divide the total of five numbers by five to obtain the mean of those five values.
We will get

as a result.
Therefore, 25 is the mean of the first five multiples of 5.
Hence, option 2 is correct.

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