Mathematics, 06.03.2020 23:25 nathangirnet
A particular concentration of a chemical found in polluted water has been found to be lethal to 20% of the fish that are exposed to the concentration for 24 hours. Twenty fish are placed in a tank containing this concentration of the chemical in water.
a) Find the probability that at most 16 survive.
b) Find the mean and variance of the number that survive
Answers: 2
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