A bag of 10 marbles has 5 green marbles, 3 blue marbles, and 2 yellow marbles.
Find the probability of selecting 2 blue marbles if the first selection is replaced before the next selection is made.
A correct interpretation of the statement, “the probability that a fair coin lands heads up is 0.50,” would be which of the following?
(a) To make sure that you get two heads you need to only flip four coins.
(b) In the next two flips of a coin, there will be exactly one head and one tail.
(c) A computer simulation of 100 coin flips would produce exactly 50 heads and 50 tails.
(d) Over a long period of time, there will be equal proportions of heads and tails.
A bag of 10 marbles has 5 green marbles, 3 blue marbles, and 2 yellow marbles.
Find the probability of selecting a green marble followed by a yellow marble if each selection is not replaced.
An assignment of probabilities to events in a sample space must obey which of the following?
(a) The probabilities must sum to 1 when adding over all outcomes in the sample space.
(b) The probabilities must obey the addition rule for disjoint event.
(c) The probabilities must each be a number between 0 and 1, inclusive.
(d) All of the above.
A bag of 10 marbles has 5 green marbles, 3 blue marbles, and 2 yellow marbles.
Find the probability of selecting all blue marbles if each selection is not replaced.
The sample space for tossing three fair coins is {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}. What is the probability of exactly three tails?
(a) 3/8 (b) 1/8 (c) 1 (d) 1/2
Two events A and B are mutually exclusive.
If P (A) = 0.4 and P (B) = 0.2, what is P (A or B)?
(a) 0.6 (b) 0.5 (c) 0.8 (d) 0.9The sample space for tossing three fair coins is
{HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}.
What is the probability of exactly one head?
(a) 3/8 (b) 1/8 (c) 1 (d) 1/2