Problem: 2012-11-23 at 14:46.png
Attempt: $\displaystyle C^6_1 \cdot 0.05^1 \cdot 0.95^5$
Correct is: 0.2036
Problem: 2012-11-23 at 14:46.png
Attempt: $\displaystyle C^6_1 \cdot 0.05^1 \cdot 0.95^5$
Correct is: 0.2036
You did not bother to tell witch one you are trying to do.
a) $\displaystyle \binom{6}{0}(.05)^0(.95)^{6-0}$
b) $\displaystyle \binom{6}{1}(.05)^1(.95)^{6-1}$
c) $\displaystyle \sum\limits_{k = 2}^6 {\binom{6}{k}(.05)^k(.95)^{6-k}}$ or
$\displaystyle 1-\left(\binom{6}{0}(.05)^0(.95)^{6-0}+\binom{6}{1}(.05)^1(.95)^{6-1}\right)$
I honestly can't figure out how they got that answer.
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