Question 1054952
For x=3
25C3(0.05)^3(0.95)^22; 25C3=2300
=0.0930
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x=2
25C2(0.05)^2(0.95)^23=0.2305
x=1 25*0.05*0.95^24=0.3650
x=0 0.95^25=0.2774
The sum of those is 0.8729.  That is p x<3.
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Probability x >=4 is 1-(0.8729+0.0930)=0.0341