Homework Soursein a large bag of marbles 35 of them are red A child chooses
in a large bag of marbles, 35% of them are red. A child chooses 4 marbles from this bag. if the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles?
in a large bag of marbles, 35% of them are red. A child chooses 4 marbles from this bag. if the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles?
in a large bag of marbles, 35% of them are red. A child chooses 4 marbles from this bag. if the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles?
Solution
Note that the probability of x successes out of n trials is
P(n, x) = nCx p^x (1 - p)^(n - x)
where
n = number of trials = 4
p = the probability of a success = 0.35
x = the number of successes = 3
Thus, the probability is
P ( 3 ) = 0.111475 [answer]
