A dartboard has 10 equally sized slices numbered from 1 to 10 . Some are grey and some are white. The slices numbered 1 , 2 , 3 , 4 , 5 , 6 , 8 , 9 ,and 10 are grey. The slice numbered 7 is white. A dart is tossed and lands on a slice at random. Let X be theeventthat the dart lands on a grey slice, and let PX be theprobabilityof X . Letnot X be the event that the dart lands on a slice that is not grey, and let P not X be the probability ofnot X .

(a)For each event in the table, check theoutcome(s)that are contained in the event. Then, in the last column, enter the probability of the event.

Event	Outcomes	Probability
1	2	3	4	5	6	7	8	9	10
X											=PX
not X											=PnotX

(b)Subtract.

=1PX

(c)Select the answer that makes the sentence true.

1PX is the same as (Choose one).