4 Prices in dollars of 11 caravans in a showroom are as follows.
\(\begin{array} { l l l l l l l l l l l } 16800 & 18500 & 17700 & 14300 & 15500 & 15300 & 16100 & 16800 & 17300 & 15400 & 16400 \end{array}\)
- Represent these prices by a stem-and-leaf diagram.
- Write down the lower quartile of the prices of the caravans in the showroom.
- 3 different caravans in the showroom are chosen at random and their prices are noted. Find the probability that 2 of these prices are more than the median and 1 is less than the lower quartile.