## mathmath333 one year ago Their are 4 letters and 4 envelopes.find the number of ways in which only two letters go in wrong envelope ?

1. 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}}

2. anonymous

its c 6 ways

3. mathmath333

yea how u got it

4. 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 $^{4}c _{2} = 6$

5. mathmath333

thnks

6. anonymous

no worries :)

7. anonymous

Yep :) It's C, 6 ways :)