I can figure out how A is sufficient.
Can you show me how B is sufficient?
Since the average daily balance was $540 at the end of the 25th day, the payment of $300 had been already applied to the balance?
Can a part of the payment be applied after the 25th?
GMAT prep software question
This topic has expert replies
- jayhawk2001
- Community Manager
- Posts: 789
- Joined: Sun Jan 28, 2007 3:51 pm
- Location: Silicon valley, California
- Thanked: 30 times
- Followed by:1 members
The average can be computed asatarafder wrote:I can figure out how A is sufficient.
Can you show me how B is sufficient?
Since the average daily balance was $540 at the end of the 25th day, the payment of $300 had been already applied to the balance?
Can a part of the payment be applied after the 25th?
[ 600*x + 300*(30-x) ] / 30
1 - sufficient. We know x = 21. So, we can compute the average
2 - sufficient. Payment already applied. You can use the above
formula but replace 30 with 25 and equate it to 540. You can solve
for x and then compute the average for 30 days.
Hence D.