Difference between binomdist and norm.dist

We use binomdist when:

1. The random variables are "discrete". For example number of cockroaches found in a jar would be discrete, because it pretty much has to be an integer

2. There is the idea of "trials"

binomdist gives a probability. Now, watch for "false" and "true". Here is a Youtube on this.

We use norm.dist when the random variable is continuous. This posting (in my blog here) might help.