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# Set A and B, the elements in B are elements in A plus a

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Senior Manager
Joined: 08 Aug 2005
Posts: 251

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Set A and B, the elements in B are elements in A plus a [#permalink]

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27 Nov 2005, 03:43
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Set A and B, the elements in B are elements in A plus a number k. M is A's mean and O is A's deviation. If OL is the deviation of B, what is the relationship between O and OL?

1). k=m
2). m<=k<=m+o

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Director
Joined: 14 Sep 2005
Posts: 984

Kudos [?]: 220 [0], given: 0

Location: South Korea

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28 Nov 2005, 01:51
NO IDEA!

Somebody shed light on this, please!
_________________

Auge um Auge, Zahn um Zahn !

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Manager
Joined: 30 Aug 2005
Posts: 183

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10 Dec 2005, 06:07
I can atleast see #1, if they provided n (number of items in A), it would've been suff.
ol = (1+ 1/n) o

Kudos [?]: 15 [0], given: 0

10 Dec 2005, 06:07
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