Given two decks of 52 playing cards, you flip one over from each deck. assuming fair decks, what is p({the two cards are the same suit})?  

The sum of two numbers is 86, and their difference is 20. find the two numbers

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set