Expand second bracket
5x+34=14x-2
34+2=14x-5x
36=9x
x=36/9
x=4
Consider that
This means that a sport has a 0.4 chance of being sold out if 2 out of 5 events are sold out.
Rugby 7s has 3 out of 5 events sold out
Juntior athletics has 3 out of 5 events sold out
Volleyball has 2 out of 5 events sold out, so this is the sport you're looking for.
As for the second question, rugby and athletics are both sold out on two events (events 1 and 5). So, again, the chance is of 2 out of 5 events, which leads to a probability of
You need to find 20% of $1580.00.
20% of $1580.00 =
= 20% * $1580.00
= 0.20 * $1580.00
= $316.00