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Which of the following procedures is always equivalent to

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Which of the following procedures is always equivalent to [#permalink] New post 01 Sep 2008, 07:41
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Which of the following procedures is always equivalent to adding 5 given numbers and then dividing the sum by 5?

I. Multiplying the 5 numbers and then finding the 5th root of the product.
II. Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left.
III. Ordering the 5 numbers numerically and then selecting the middle number.

(A) None
(B) I only
(C) II only
(D) III only
(E) I and III
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Re: PS-Fives [#permalink] New post 01 Sep 2008, 09:03
klb15 wrote:
Which of the following procedures is always equivalent to adding 5 given numbers and then dividing the sum by 5?

I. Multiplying the 5 numbers and then finding the 5th root of the product.
II. Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left.
III. Ordering the 5 numbers numerically and then selecting the middle number.

(A) None
(B) I only
(C) II only
(D) III only
(E) I and III


IMO C)

II means 2(a + b +c + d +e)/10
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Re: PS-Fives [#permalink] New post 01 Sep 2008, 13:13
klb15 wrote:
Which of the following procedures is always equivalent to adding 5 given numbers and then dividing the sum by 5?

I. Multiplying the 5 numbers and then finding the 5th root of the product.
II. Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left.
III. Ordering the 5 numbers numerically and then selecting the middle number.

(A) None
(B) I only
(C) II only
(D) III only
(E) I and III


how to find the average of 5 numbers?

A
Re: PS-Fives   [#permalink] 01 Sep 2008, 13:13
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