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# Nurse Joe recorded the weights of each of the five babies born yesterd

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Manager
Joined: 23 Feb 2017
Posts: 58
Nurse Joe recorded the weights of each of the five babies born yesterd  [#permalink]

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12 Jan 2018, 19:43
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Difficulty:

25% (medium)

Question Stats:

77% (01:43) correct 23% (01:32) wrong based on 40 sessions

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Nurse Joe recorded the weights of each of the five babies born yesterday. What is the arithmetic mean of the weights of the five babies?
(1) The cumulative weight of the first three babies was 21 pounds.
(2) The cumulative weight of the last three babies was 24 pounds.
Math Expert
Joined: 02 Aug 2009
Posts: 8309
Re: Nurse Joe recorded the weights of each of the five babies born yesterd  [#permalink]

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12 Jan 2018, 20:12
mandeey wrote:
Nurse Joe recorded the weights of each of the five babies born yesterday. What is the arithmetic mean of the weights of the five babies?
(1) The cumulative weight of the first three babies was 21 pounds.
(2) The cumulative weight of the last three babies was 24 pounds.

Many Q are on these lines..
a,b,c,d,e..
We are looking for a+b+c+d+e/5
1) a+b+c=21..
Insufficient
2) c+d+e=24
Insufficient..

Combined..
a+b+c+c+d+e=21+24=45...
But c is added twice and we don't know the individual weight.
Insufficient
E
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Re: Nurse Joe recorded the weights of each of the five babies born yesterd   [#permalink] 12 Jan 2018, 20:12
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