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Re: Is the average(arithmetic mean) of 5 different positive [#permalink]
08 Jul 2013, 09:26

This answer should be a B anyone get this OA yet?

and bewa.. yes it is an integer and multiplied by tself it is the multiple of any integer incl 10 bu tthen the sum is already given, which boundary are you trying to fathom?

Re: Is the average(arithmetic mean) of 5 different positive [#permalink]
08 Jul 2013, 09:43

Expert's post

docdrizzeally wrote:

This answer should be a B anyone get this OA yet?

and bewa.. yes it is an integer and multiplied by tself it is the multiple of any integer incl 10 bu tthen the sum is already given, which boundary are you trying to fathom?

Is the average (arithmetic mean) of 5 different positive integers at least 30?

It's almost always better to express the average in terms of the sum. The question basically asks whether the sum of 5 different positive integers is at least 5*30=150.

(1) Each of the integers is a multiple of 10 --> the least values of these 5 different positive integers are: 10, 20, 30, 40, and 50 --> the sum = 150. Sufficient.

(2) The sum of the 5 integers is 160. Directly answers the question. Sufficient.

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