<p>i took calc bc. Do i need to take 21-256? I ask because i want to take intro to prob and stats(36-225) but it says 21-256 is a prereq... I am going to take calc in 3d this fall. can i take 36-225? thanks!</p>
<p>21-256 is an "or" prereq. You don't need to take it to take 36-225. So if you took Calc BC, I imagine you got credit for 21122 or something. That means you can take 36-225. Note the very important difference between "and" and "or" in prereq listings!</p>
<p>What is the difference between 21-256 and 21-122. I have credit for 21-122 but they put me in 21-256 because I'm a math major (21-122 isn't required and I placed out). Some of the topics sound the same. Will 21-256 be easy for me if I did well in 21-122?</p>
<p>21-256 is multivariate (as is 259). If you have a good foundation in univariate calculus, I'd imagine you'll be OK (I haven't taken 256, just so you know).</p>
<p>i still dont udnerstand what 21-256 is for but it doesnt look like i need it soon so whatever.</p>
<p>what is the difference between 36-225 and 36-201</p>
<p>36-201 is supposed to be really easy, and 36-225 is hard to easy (everyone has a different opinion). Look in the course catalog for descriptions.</p>
<p>201 is your basic stats course (what's a quartile and such). 225 has more of an emphasis on probability theory.</p>
<p>The difference to CS students is that 225 satisfies a CS requirement and 201 doesn't.</p>