Can you explain where each of the student’s responses came from? As in, how did he arrive at 8/24, 14/96, and what is either 24/72 or 14/72.

I saw this one in class last week:

Probability of flipping 10 heads when flipping 10 coins: (1/2)^10

Probability of flipping 9 heads when flipping 10 coins: (1/2)^9

What say you all about this work?

Thanks to Andrew for the submission!

At 1:30, a student says, “if you do that probability 3 times, you ought to get that probability at least once.”

How should I have responded to this student? (I actually have the footage, which we can analyze at some point if we think that’d be fun.)