Find the 90th percentile of the normal curve

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$P(Z<z)=0.90\to z=1.282.$ $P (Z < z) = 0.90 \to z = 1.282.$

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a. Determine the number of sets of all possible random samples that can be drawn from the given population by using formula,nCn,where N is the population size and n is the sample size.write your solutions in the box below.
On the 3rd quarter examination in Statistics, the population mean was 70 and the population standard deviation was 9. Determine the standard score of a student who got a score of 88 assuming that the scores are normally distributed.

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