Question 976449
Good unit: {{{P=35/40=7/8}}}
Bad unit: {{{P=5/40=1/8}}}
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a) {{{P=(7/8)(7/8)(1/8)=343/512}}}
b) {{{P=(1/8)(7/8)(7/8)=49/512}}}
c) {{{P=(7/8)(1/8)(7/8)=49/512}}}
d) {{{P=(7/8)(7/8)(1/8)=49/512}}}
e) {{{P=3(49/512)=147/512}}}
f) {{{P=3(1/8)(1/8)(7/8)=21/512}}}
g) {{{P=(1/8)(1/8)(1/8)=1/512}}}