A-LevelMathematicsProbability and statisticsMay/June 2021Paper 6 Q48 Marks
Wendy's journey to work consists of three parts: walking to the train station, riding on the train and then walking to the office. The times, in minutes, for the three parts of her journey are independent and have the distributions N(15.0, 1.1²), N(32.0, 3.5²) and N(8.6, 1.2²) respectively. If Wendy's journey takes more than 60 minutes, she is late for work.
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