Harley1980 wrote:
Source : GMATPrep Default Exam Pack
Comcorp Shipping Clerk: Last week, no shipments of building supplies were sent out on Friday. The five specially ordered shipments sent out last week were sent out on Thursday, and each of those specially ordered shipments consisted entirely of building supplies. Four shipments were sent to Truax Construction last week, none of which consisted of building supplies.
If the shipping clerk's statements are true, which of the following must also be true?
(A) All of Comcorp's shipments of building supplies last week were specially ordered.
(B) None of Comcorp's shipments sent on friday of last week was sent to Truax Construction.
(C) None of the shipments sent by Comcorp by Truax Construction last week was specially ordered.
(D) None of Comcorp's shipments sent on Thursday of last week was sent to Truax Construction.
(E) All of Comcorp's shipments of building supplies last week were sent out on Thursday.
No building supplies shipments on Friday.
All 5 specially ordered shipments were building supplies and were sent on Thursday.
4 shipments to Truax, no building supplies
If the shipping clerk's statements are true, which of the following must also be true?
(A) All of Comcorp's shipments of building supplies last week were specially ordered.
Not sure. We know the 5 were specially ordered. We don't know about the 4.
(B) None of Comcorp's shipments sent on friday of last week was sent to Truax Construction.
We don't know. We know Friday shipments were not building supplies. Rest we don't know.
(C) None of the shipments sent by Comcorp by Truax Construction last week was specially ordered.
Yes, all specially ordered shipments were sent on Thursday and all had building supplies. But Truax got NO building supplies. Hence Truax got no specially ordered shipments.
(D) None of Comcorp's shipments sent on Thursday of last week was sent to Truax Construction.
5 specially ordered shipments were sent on Thursday we know. But we don't know whether any other non special shipments were also sent on Thursday. Those could have been sent to Truax.
(E) All of Comcorp's shipments of building supplies last week were sent out on Thursday.
We don't know about other shipments at all. They could have been building supplies and could have been sent on say Monday.
Answer (C)