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Which of the following procedures is always equivalent to [#permalink]
25 Aug 2003, 19:39
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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
I say II and III but answer says only III??? who is right and why?