Graphical Interpretation - Average

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 269
Joined: 19 Sep 2013
Thanked: 94 times
Followed by:7 members

Graphical Interpretation - Average

by mevicks » Tue Sep 24, 2013 8:27 pm
Image

Twenty-five adults reported the amount of time each spent exercising during a particular week. The results are summarized in the graph as follows: 5 respondents reported exercising for less than 1 hour, 3 respondents reported exercising for at least 1 hour but less than 2, and so on.

The number of respondents who exercised on average less than one-half hour per day during the week is between ___________ , inclusive.

A) 0 and 5
B) 5 and 8
C) 8 and 10
D) 10 and 14
E) 14 and 19
[spoiler]
OA: After a few replies. :|
The original explanation states that "A respondent who averaged less than one-half hour of exercise per day would have reported less than 3.5 hours of exercise for the week".
Shouldn't this be 10.5 hours for the week?

(Total Hours Spent Exercising in a Week)/(7 Days) = 1.5 Hours per day
Thus Total hours = 1.5 * 7 = 10.5[/spoiler]

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 273
Joined: 21 Sep 2010
Location: Raleigh, NC
Thanked: 154 times
Followed by:74 members
GMAT Score:770

by Whitney Garner » Wed Sep 25, 2013 4:06 am
mevicks wrote:The original explanation states that "A respondent who averaged less than one-half hour of exercise per day would have reported less than 3.5 hours of exercise for the week".
Shouldn't this be 10.5 hours for the week?

(Total Hours Spent Exercising in a Week)/(7 Days) = 1.5 Hours per day

Be careful, "one-half hour" and "one and a half hours" (1.5 hours) are not the same thing. If you exercise only ONE, half hour, then that is 1/2 hour or 0.5 hours.

Hope this helps!
:)
Whit
Whitney Garner
GMAT Instructor & Instructor Developer
Manhattan Prep

Contributor to Beat The GMAT!

Math is a lot like love - a simple idea that can easily get complicated :)

Master | Next Rank: 500 Posts
Posts: 269
Joined: 19 Sep 2013
Thanked: 94 times
Followed by:7 members

by mevicks » Wed Sep 25, 2013 4:32 am
Whitney, thanks a ton for pointing that out! All the steps are crystal clear now B-)

Thanks & Regards,
Vivek

Master | Next Rank: 500 Posts
Posts: 269
Joined: 19 Sep 2013
Thanked: 94 times
Followed by:7 members

Graphical Interpretation - Average

by mevicks » Wed Sep 25, 2013 4:42 am
Original explanation :
Image

[spoiler]OA: D) 10 and 14
[/spoiler]

Newbie | Next Rank: 10 Posts
Posts: 1
Joined: 06 Jan 2015

by Kashif77 » Tue Jan 06, 2015 9:54 pm
This is greatly average post........you shook posting it......thanks a lot.......!!!
Are you worried about learn spanish dumps exam & 1z0-051 preparation? We offer up-to-dated italian language