Random sampling is when people are chose at random from a population.
Population is the chits that have been put up on the dart board.
Blindly throwing darts to select 5 names is selecting randomly. In this case, there will be no bias involved in it as names are chosen blindly.
Random sampling method.
A random sampling is a sampling technique in which a researcher randomly picks participants for the sample such that the chances for each participants to get selected is equal.
Given : In a study, the sample is chosen by putting people's names on a dartboard, and blindly throwing darts to select 5 names.
Here , the probability to throw dart on any any name is equal because they throwing it blindly.
Thus, this sampling method is a random sampling method.
she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.