What percent of humanity is left handed, and why isn't it 50 percent?

Question #23310. Asked by Lefty.

Last updated Aug 23 16.

Originally posted Oct 16 02 4:34 AM.

Whats 30 percent of 50http://www.cs.uu.nl/wais/html/na-dir/lefty-faq.html

Whats 30 percent of 50http://cogprints.org/135/

Whats 30 percent of 50http://www.holidayinsights.com/other/lefthand.htm

. while in humans that percentage hovers around 10.

[discover.com/jan_02/featbiology.html] link no longer works

Post last edited by gtho4 on Aug 23 2016.

Post last edited by gtho4 on Aug 23 2016.

Whats 30 percent of 50http://www.holidayinsights.com/other/lefthand.htm

Post last edited by gtho4 on Aug 23 2016.


Whats 30 percent of 50

In my math class I'm currently getting a 78.2%. I need a 73% to pass. I have two tests left to turn in, one of which is my final. Both tests are 15% of my grade. Let's say I get a 90% on one test, what will I need to get on the second test to pass the class?

Roger: You will need at least 31.74% on the second test to get a 73% overall.

My final exam is worth 30% and I still have my culminating (100 marks) and a seminar to do (40 marks). My current average is 72.3. We had to do a midterm exam which was worth 40% of our grade (I got a 60.9 on it ). Once the final exam is done, the midterm will only be worth 10%. I just want to know. is it possible to get an 80% ? Also, if my midterm will only be worth 10% after my final exam, could that bring my average up or it won't change anything? And this is for English. 🙂

Roger: You’re right. Once you take the final, your midterm will not affect your grade as much. You will need about an 86.6% on the Final to get a 80% overall. (I disregarded your 100 point “culminating” and 40 point “seminar”, because you didn’t say how they were factored into your grade.)