Prices in dollars of 11 caravans in a showroom are as follows.
16 800 18 500 17 700 14 300 15 500 15 300 16 100 16 800 17 300 15 400 16 400
(i) Represent these prices by a stem-and-leaf diagram. [3]
(ii) Write down the lower quartile of the prices of the caravans in the showroom. [1]
(iii) 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.
[3] ( I just need help in part (iii) )

Question

Prices in dollars of 11 caravans in a showroom are as follows.
16 800 18 500 17 700 14 300 15 500 15 300 16 100 16 800 17 300 15 400 16 400
(i) Represent these prices by a stem-and-leaf diagram. [3]
(ii) Write down the lower quartile of the prices of the caravans in the showroom. [1]
(iii) 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.
[3]   ( I just need help in part (iii) )