write any three to digited consecutive numbers. find their arithmetic mean. check whether the arithmetic mean is one of those numbers or not.
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Answered by
34
Let the numbers be, a,a+1,a+2
Arithmetic Mean =a+a+1+a+2/3
=3a+3/3
=a+1
Here, the arithmetic mean is the (a+1) number
Take the two digit numbers as: 30,31,32
AM=frac30+31+32/3
=933/3
=31
So, 31 is one of the number in those.
Already,we know that the AM is a+1
and it is 30 (middle term)
=> a+1 = 30
Therefore, the arithmetic mean is one of those numbers or not.
Answered by
73
Correct aythe thank chey ...
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