(a(i))[3]
Use the grid to plot a histogram for this data.
(a(ii))[2]
Find the percentage of these visitors who stayed in the library for more than $40$ minutes.
(b(i))[1]
Find the median value.
(b(ii))[2]
Calculate the mean value.
(b(iii))[1]
A visitor is chosen at random. Find the probability that this visitor borrowed more than 4 books.
(b(iv))[3]
Two visitors are chosen at random. Find the probability that exactly one of them borrowed 6 books. Give your answer as a decimal correct to 4 significant figures.