mathmath333
  • mathmath333
Their are 4 letters and 4 envelopes.find the number of ways in which only two letters go in wrong envelope ?
Mathematics
schrodinger
  • schrodinger
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mathmath333
  • mathmath333
\(\large \color{black}{\begin{align} & \normalsize \text{Their are 4 letters and 4 envelopes.find the number of ways }\hspace{.33em}\\~\\ & \normalsize \text{in which only two letters go in wrong envelope ?}\hspace{.33em}\\~\\ & a.)\ 4 \hspace{.33em}\\~\\ & b.)\ 5 \hspace{.33em}\\~\\ & c.)\ 6 \hspace{.33em}\\~\\ & d.)\ 3 \hspace{.33em}\\~\\ \end{align}}\)
anonymous
  • anonymous
its c 6 ways
mathmath333
  • mathmath333
yea how u got it

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anonymous
  • anonymous
we will need to select the two letters which have to be put in wrong envelop . that is \[4 \times \frac{ 3 }{ 2 }\] i.e \[^{4}c _{2} = 6\]
mathmath333
  • mathmath333
thnks
anonymous
  • anonymous
no worries :)
anonymous
  • anonymous
Yep :) It's C, 6 ways :)

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