6. A standard pack of 52 playing cards is used. What is the probability that: (a) If two cards are picked, that they are both spades?
(b) If two cards are picked, that they are of the same suit?
(c) If three cards are picked, that they are all of the same suit?
(d) If two cards are picked, then they are a pair i. e. two cards with the same value?
(e) If four cards are picked, then they are two from each of two different suits? [hard]

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

step-by-step explanation: