v call every 15th phone number on every 5th page of the phone book dividing the population by Gender, and choosing 30 people of each gen v selecting a classroom number at random then surveying all the student room writing everyones name on a playing card, shuffling the deck, then choc 20 cards v asking people on the street empling Method

A population of values has a normal distribution with μ=161 and σ=16.3. You intend to draw a random sample of size n=45.Find the probability that a sample of size n=45 is randomly selected with a mean between 155.4 and 165.6. P(155.4 < M < 165.6) = Enter your answers as numbers accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

How many different ways are there to choose a dozen donuts from the 21 varieties at a donut shop?

14 people try out for a basketball team, how many different ways are there to select 5 players if each one of them is assigned to a specific position?