Overall, the amount of volunteered work days done by the staff in organizing the camp is normally distributed around 45 with a standard deviation of 7 days.

What's the probability thata staff volunteered more than 35 days?

What percentile does 55 volunteered work days rank at?

What is the probability of working 50 days?

What is the probability that a staff will volunteer more than 43 day?

The staff with the number of volunteered work days in the top 10^thpercentile will receive as reward 8 movie tickets.At least how many days you should volunteer in order to receive these tickets?

What is the probability of volunteering between 30 and 48 days?

The staff whose number of volunteered work days is smaller than the 12^thpercentile will have lower priority when choosing their vacation days. At least how many days should you volunteer to avoid this situation?

If 36 people (36 = size of the sample) are selected randomly, what's the likelihood that their mean number of volunteered work-days will be within 4 days of the population mean?