Notes
\(\text{Probability}=\displaystyle \frac{\text{Successful Events}}{\text{Total Events}}\)
\(\text{Probability of 2 Independent Events}\)
\(\text{(Probability event 1)} \times \text{(Probability event 2)}\)
Practice Questions
\(\textbf{1)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of both marbles being green? 
\(\textbf{2)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of both marbles being blue?
\(\textbf{3)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of neither marble being red?
\(\textbf{4)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of neither marble being green?
\(\textbf{5)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being red and the second blue without replacement?
\(\textbf{6)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being blue and the second red without replacement?
\(\textbf{7)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being red and the second blue with replacement?
\(\textbf{8)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being blue and the second red with replacement?
\(\textbf{9)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being green and the second blue with replacement?
\(\textbf{10)}\) There is a box of marbles. There are 12 red, 7 green and 11 blue marbles. You select 2 marbles.
What is the probability of the first marble being green and the second blue without replacement?
\(\textbf{11)}\) You flip a coin and roll a six-sided die.
What is the probability of getting a head and a 5?
\(\textbf{12)}\) You flip a coin and roll a six-sided die.
What is the probability of getting a tail and a 3?
\(\textbf{13)}\) You flip a coin and roll a six-sided die.
What is the probability of getting a tail and a 1?
\(\textbf{14)}\) You flip a coin and roll a six-sided die.
What is the probability of getting a tail and an even on the die?
\(\textbf{15)}\) You flip a coin and roll a six-sided die.
What is the probability of getting a tail and an odd on the die?