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
P(x > 18) = 12.3 %
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