N=20 P=.82

A. P(X=19)

B. P(X=18)

C. P(X>18)

FOR PART C THE GREATER THAN SIGN HAS A LINE UNDERNEATH=

Please note that we have:

P (x = 19) = 20* 0.82^19* 0.18 = 0.101

P( x = 18) = 190*0.82^18 * 0.18^2 =0.173

and:

P(x > 18) = 12.3 %

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