How to solve this Probability Problem. Please Help.

Jas100

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Oct 13, 2015
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Suppose a large set of islands have turtle populations that are approximately normally distributed with a mean population of 2100 per island and a standard deviation of 52.3. Suppose we take a simple random sample of 10 islands.

a) Find the probability that at least 4 of those islands from the Simple Random Sample (SRS) have a turtle population of AT LEAST 2150.
b) Find the probability that the average turtle population for the Simple Random Sample (SRS) is BETWEEN 2090 and 2110 turtles.

Please Help I have no clue how to begin or solve.

Please Help!
 
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