Posted by caitlin on .
You are going to toss 2 pennies 20 times. Make a prediction. how many times do you think the 2 pennies will come up as:
2 heads:
2 tails:
1 head, 1 tail:

math 
bobpursley,
You can pick any number: it is a prediction. In 20 times, the distribution will be binomial, and it will vaguely look like a normal distribution, if one did it 2000 times, it would look much more normal.
http://members.shaw.ca/ron.blond/TLE/Bin.APPLET/index.html