Apps. and Interpretation HL Practice Paper Book | Page 194

4 . A discrete random variable X has the following probability distribution .

x 1 2 3 4 P ( X � x)

2 2 2

2

5k k � 6k k � k k

( a ) Show that

1 k � .

8

( b ) Find P ( X �2 | X � 2 ) .

[ 3 ]

[ 3 ]

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