problem Normal intersection Age 16 to 18 Challenge level Explore the intersection possibilities for normal pdfs.
problem Aim high Age 16 to 18 Challenge level How do you choose your planting levels to minimise the total loss at harvest time?
problem Into the normal distribution Age 16 to 18 Challenge level Investigate the normal distribution
problem Over-booking Age 16 to 18 Challenge level The probability that a passenger books a flight and does not turn up is 0.05. For an aeroplane with 400 seats how many tickets can be sold so that only 1% of flights are over-booked?