5) c) I. Draught excluder for doors and windows is sold in rolls of nominal length 10 meters. The actual length X meters

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5)
c)
I. Draught excluder for doors and windows is sold in rolls ofnominal length 10 meters. The actual length X meters of draughtexcluder on a roll may be modeled by a normal distribution withmean 10.2 and standard deviation is 0.15. Determine the 𝑃(10 < 𝑋< 10.5)
II. The height of 2000 students are normally distributed with amean of 174.5cm and a standard deviation of 6.9cm. Assuming thatthe heights are recorded to the nearest half – centimeter. How manyof these students would you expect to have height less than160cm?