Practicing Success
Practicing Success
CUET Preparation Today
There are four letters and four addressed envelopes. The chance that all letters are not dispatched in the right envelope is |
$\frac{19}{24}$ $\frac{21}{23}$ $\frac{23}{24}$ $\frac{1}{24}$ |
$\frac{23}{24}$ |
Required probability is 1 – P (they go in concerned envelopes) = $ 1=\frac{1}{4!}=\frac{23}{24}$. |
