A protective enchantment which alerts the Charms professor when a death eater attacks a magical school is designed to have a 90% reliability rate. Suppose that the nine magical schools equipped with this enchantment experienced an attack from the death eaters. Define the random variable X as the number of Charms professors alerted out of nine. Assuming that protective enchantment alerts are independent Write down the associated PMF of X. Compute for the probability of alerting at least 7 charms professors|
A protective enchantment which alerts the Charms professor when a death eater attacks a magical school is designed to have a 90% reliability rate. Suppose that the nine magical schools equipped with this enchantment experienced an attack from the death eaters. Define the random variable X as the number of Charms professors alerted out of nine. Assuming that protective enchantment alerts are independent Write down the associated PMF of X. Compute for the probability of alerting at least 7 charms professors|
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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![A protective enchantment which alerts the Charms professor when a death eater attacks a
magical school is designed to have a 90% reliability rate. Suppose that the nine magical
schools equipped with this enchantment experienced an attack from the death eaters.
Define the random variable X as the number of Charms professors alerted out of nine.
Assuming that protective enchantment alerts are independent
Write down the associated PMF of X. Compute for the probability of alerting at least
7 charms professors](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6e10c9f6-26eb-4de2-9d67-77d7505937ce%2F48d6d192-6692-45a0-9290-613849ed8225%2Fiexykji_processed.png&w=3840&q=75)
Transcribed Image Text:A protective enchantment which alerts the Charms professor when a death eater attacks a
magical school is designed to have a 90% reliability rate. Suppose that the nine magical
schools equipped with this enchantment experienced an attack from the death eaters.
Define the random variable X as the number of Charms professors alerted out of nine.
Assuming that protective enchantment alerts are independent
Write down the associated PMF of X. Compute for the probability of alerting at least
7 charms professors
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