Or search by topic
There are 3 NRICH Mathematical resources connected to SM - Normal distribution, you may find related items under Stage 5 Statistics mapping document.
Broad Topics > Stage 5 Statistics mapping document > SM - Normal distributionExplore the intersection possibilities for normal pdfs.
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?