A tricky one! Do you agree with OA?

[ShalomFang]

Nearly all mail that is correctly addressed arrives at its destination within two business days of being sent. In fact, correctly addressed mail takes longer than this only when it is damaged in transit. Overall, however, most mail arrives three business days or more after being sent. If the statements above are true, which one of the following must be true?



A) A large proportion of the mail that is correctly addressed is damaged in transit.

B) No incorrectly addressed mail arrives within two business days of being sent.

C) Most mail that arrives within two business days of being sent is correctly addressed.

D) A large proportion of mail is incorrectly addressed.

E) More mail arrives within two business days of being sent than arrives between two and three business days after being sent.

《I will post the OA soon... 》

[rajiv9415]

i will go for C

[kold82]

i ll go for A

[score800]

C all the way

[kamal_gmat2005]

will go for C too

[800Bob]

I say D.

Here's why C is wrong.

Let's say that of 100 pieces of mail, 20 are correctly addressed and 80 are incorrectly addressed. Almost all the 20 correctly addressed pieces (say 18 or 19) arrive within 2 business days. Of the 80 incorrectly addressed pieces, let's say that 55 arrive in 3 or more business days, and 25 arrive within 2 business days.

These numbers all conform to the given information, and with these numbers we have more incorrectly addressed mail than correctly addressed mail arriving within 2 business days. Thus C is not necessarily true.

[adcambridge]

I think A is the ans

[sumeet_rana]

I would go with D.
Agree with 800Bob's reasoning.
Also

How can the 2 statements given below (as in C) be true at the same time. ?

C: Most mail that arrives within two business days of being sent is correctly addressed.

"Overall, however, most mail arrives three business days or more after being sent."

[mav]

Agree with D

C is wrong bcauz it restate a premise in the passage
"Nearly all mail that is correctly addressed arrives at its destination within two business days of being sent"

[heike2504]

i would go for D as well. so, what does OA say?