<PRE><B>Question 1083837</B>
5C2 or 10 are the number of ways 2 can be selected.
multiply by 0.2^2*0.8^3=0.2048
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none is 0.8^5=0.3277
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3 or more will contact
1 will is 5*0.2*0.8^4=0.4096 (the expected value)
0,1,2 add to 0.93=421, so 3,4,5 are 0.0579.
Can check by 
3: 10*0.2^3*0.8^2=0.0512
4:5*0.2^4*0.8=0.0064
5:0.2^5=0.0003
add to 0.0579</PRE>