it is non-random and prone to bias unrepresentative of target population
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100% or each one of them.
That is not true. It is true for a simple random sample but not one that is systematic.
A simple random sample or a probability sample.
Stratified Random Sampling: obtained by separating the population into mutually exclusive (only belong to one set) sets, or stratas, and then drawing simple random samples (a sample selected in a way that every possible sample with the same number of observation is equally likely to be chosen) from each stratum.
If only one card is selected the probability is 12/13.If only one card is selected the probability is 12/13.If only one card is selected the probability is 12/13.If only one card is selected the probability is 12/13.