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## 1000 CR - Query

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This topic has 2 member replies
Sharad.Inc Newbie | Next Rank: 10 Posts
Joined
16 Apr 2007
Posted:
1 messages

#### 1000 CR - Query

Tue Apr 17, 2007 3:18 am
If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

Why is the answer C and not B ?

S

### Top Member

Roland2rule Legendary Member
Joined
30 Aug 2017
Posted:
667 messages
Followed by:
3 members
Fri Sep 22, 2017 7:47 pm
If A, then B. which can also be interpreted as (if not B, then not A).
Both B and C are wrong.
I think this follows the Alphabet sequence. Hence, option D will be considered by me as the right option.

bww Senior | Next Rank: 100 Posts
Joined
29 Apr 2007
Posted:
55 messages
1
Sun May 13, 2007 8:11 pm
something with contrapositives?

"If A, then B" corresponds to "If not B, then not A." It is not "If not A, then not B." ??

Thus, "if not D, then not A" adheres. "If not B, then not C" does not follow the same logic (it would be "if not C, the not B").

???

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