#10 Chairs in pairs
Set by Peter Rowlett
Abbie and Bryn are allocated places to sit at random in a row of four seats. What is the probability that they are put next to each other?
What if there are 20 seats?
On a different occasion, Abbie and her friend Ana have booked two adjacent spots on the front row, which is 22 seats long. Bryn and his friend Beth also have two adjacent seats among the 22. What is the probability the two groups are next to each other?
Solution next week
#9 Rectangulator
Solution
From the 7, we…
