An urban transport survey finds that 22% of commuters in a specific metropolitan area utilize a bike-sharing application for their daily travel.
A random sample of 45 commuters is selected. Determine the probability that at most 8 of these commuters utilize the bike-sharing application.
A second, larger random sample of 250 commuters is selected. Using a normal approximation, estimate the probability that the number of commuters in this sample who utilize the bike-sharing application is fewer than 50.
328 exam-style questions on WJEC A Level Maths 4.2 Statistical distributions (A-level only), covering 4.2.1 Statistical distributions (A-level only), 4.2.2 Statistical distributions (A-level only), and 4.2.3 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.