Hi Mike, Test 7, Section 4, Number 38. Probability: I keep losing track trying to think this through. Other than the table provided, is there a chart I can draw that will help me “see” the probabilities? Or, what’s the best / quickest way to manage this one? Thanks !

Would you please show how you would solve PSAT test section 4, #16? Thank!s

If two dice are rolled, what is the probability the sum of the numbers is 4 or 5?

* i actually thought the two dice are the same and there is no difference between (1,4) (4,1). Then my answer was 4/36=1/9

But the answer is 7/36, apparently it considered the (1,4) (4,1) (2,3) (3,2) etc. Why should we think of the dice as different?

The figure above represents four offices that will be

assigned randomly to four employees, one employee

per office. If Karen and Tina are two of the four

employees, what is the probability that each will be

assigned an office indicated with an X ?

The figure is Four boxes or (offices) and two of them are labeled X.

How’s everyone else doing on this quiz?

Disclaimers: 1) Probability problems are some of the SAT’s most difficult, but they’re also some of the most rare. There’s a pretty decent chance you won’t see a very hard question like this on your test, so prioritize your prep time; don’t worry too much about this stuff until you’ve really nailed the basics. Ironically, this (more…)

Prize this week: you get to decide, once and for all, whether Marshmallow Peeps or Cadbury Creme Eggs are the better candy. No longer will disagreements be chalked up to “difference of opinion.” Once you issue your decree, it will be a matter of record. Minor dissent will be tantamount to outright prevarication. Think you (more…)