What conditions must be met to use z procedures in a significance test about a population proportion

In order to conduct a one-sample proportion z-test, the following conditions should be met: The data are a simple random sample from the population of interest. The population is at least 10 times as large as the sample. n⋅p≥10 and n⋅(1−p)≥10 , where n is the sample size and p is the true population proportion.

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using pemdas, (order of operations) you'll see the answer is 24.