(i)[4]
Use a normal approximation to determine the probability of having fewer than $25$ cloudy days in Scotland in November ($30$ days).
(ii)[1]
State a reason that justifies using a normal approximation.
Mathematics 9709 · AS & A Level · Continuous random variables
Continuous random variables — practice question
For Scotland in November, the average proportion of cloudy days is $80\%$. Assume that the weather on one day is independent of the weather on every other day.