Question 1160651
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(a)  P = {{{1-0.86)^3}}} = {{{0.14^3}}} = 0.002744.



(b)  P = {{{0.86^3}}} = 0.636056.



(c)  P = 1 - {{{(1-0.086)^3}}} = 1 - 0.002744 = 0.997256.
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Solved.


All formulas are self-explanatory.