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by dkumar.83 » Thu Jun 24, 2010 8:33 pm
Q20:
Shipping Clerk: The five specially ordered shipments sent out last week were sent out on Thursday. Last week, all of the shipments that were sent out on Friday consisted entirely of building supplies, and the shipping department then closed for the weekend. Four shipments were sent to Truax Construction last week, only three of which consisted of building supplies.

If the shipping clerk's statements are true, which of the following must also be true?

A. At least one of the shipments sent to Truax Construction last week was specially ordered.
B. At least one of last week's specially ordered shipments did not consist of building supplies.
C. At least one of the shipments sent to Truax Construction was not sent out on Thursday of last week.
D. At least one of the shipments that were sent out on Friday of last week was sent to Truax Construction.
E. At least one of the shipments sent to Truax Construction last week was sent out before Friday.
Source: — Critical Reasoning |

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by selango » Thu Jun 24, 2010 8:57 pm
Check this post,

https://www.beatthegmat.com/need-help-to ... 59521.html

Good explanation given by albatross86

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by albatross86 » Thu Jun 24, 2010 9:01 pm
Let's break down the info we have:

Thursday : 5 Specially ordered shipments
Friday : ONLY Building supplies.
Sat/Sun : CLOSED

4 shipments to Truax, 3 of which were building supplies.

A. Not necessarily. all 4 of them could have been sent from Monday - Wednesday, which we have no information about. So we cannot comment on whether they were specially ordered or not.

B. This need not be true. It's quite possible none of the 5 special ones were building supplies.

C. Not necessarily, what if all 4 of them were specially ordered?

D. Again, what if the truax shipments were sent before Friday?

E. We know 1 of the Truax shipments is not a building supply, so it could not have been sent out on Friday since only building supplies were sent out on Friday. Also SAT/SUN was closed. So this one shipment MUST have been sent out before Friday.

Pick E.

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by jube » Thu Jun 24, 2010 10:38 pm
Yep, E.