GPREP qn.

BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

This topic has expert replies

Post new topic Post Reply

Previous Topic Next Topic

aj5105: Legendary Member; Posts: 1169; Joined: Sun Jul 06, 2008 2:34 am; Thanked: 25 times; Followed by:1 members

GPREP qn.

by aj5105 » Sat Oct 04, 2008 7:04 am

The cost of each adult's ticket for a certain concert was 30$,and the cost of each childs's ticket for the concert was 24$.If Hannah purchased tickets for this concert,what was the average (arithematic mean) cost per ticket?

1)Hannah purchased twice as many children's tickets as adults' tickets.

2)Hannah purchased 4 children's tickets.

OA-A

Quote

Source: Beat The GMAT — Data Sufficiency | Sat Oct 04, 2008 7:04 am

sethids: Master | Next Rank: 500 Posts; Posts: 135; Joined: Mon Jun 23, 2008 3:56 am; Thanked: 7 times

by sethids » Sat Oct 04, 2008 7:32 am

Adult's Ticket = $30, Child's Ticket = $24.

Number of Adult's tickets = x, Number of Child's tickets = y.

We need to find (30x + 24y)/(x+y).

Stmt1: y = 2x
(30x + 24y)/(x+y) = (30x + 24*2x)/(x+2x)
= 78x/3x
=26. Sufficient.

Stmt2: y = 4.
No information about x (number of adult's tickets) or total tickets. Insufficient.

Hence A.