gmatprep-8

FIRST THINGS FIRST: WRONG SECTION. IT's a DS.

Is n>24?
1st chair del charges = 10
thereafter 1 for each chair.

If n = 24, Delivery charges = 10 + 1*23 = 33

St1: del charges > 30
It can be both less or more than 33. INSUFF

St2: Avg cost = 1.36
Let total chairs be n.
Total cost = n*1.36
Also total cost = 10 + (n-1)*1
equate both: 10 + n -1 = 1.36*n
SUFFICIENT

Ans: B

FIRST THINGS FIRST: WRONG SECTION. IT's a DS.

SECOND THINGS SECOND: FIRST THINGS FIRST can be rewritten as

Vivek,
Please post DS questions on the Data Sufficiency section of the forum.



Regards,
Cramya

IMO B

2)

Let n be the no of chairs ordered

so (10 + (n-1)*1 )/( n ) = 1.36

solve for n and find the answer...


1) Says cost more than 30

10 + x > 30
x > 20
we don't know the exact value of n

insuff

clear B.
OA?