7th
grade

Mathematics

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accuracy

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Kelsey Stark

3 years

Mathematics

7th

grade

Dependent Probability Practice

Kelsey Stark

48
plays

13 questions

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1. Multiple Choice
30 seconds
1 pt
A bag contains 18 jerseys, 9 white and 9 red. Find the probability that you would randomly choose a white jersey, not put it back, and then choose a red jersey
$\frac{9}{18}\times\frac{8}{17}$
$\frac{9}{18}\times\frac{9}{17}$
$\frac{9}{18}\times\frac{9}{18}$
$\frac{9}{18}\times\frac{8}{18}$
2. Multiple Choice
30 seconds
1 pt
A fruit basket contains 3 bananas, 4 oranges, and 5 apples. You randomly choose and eat three pieces of fruit. Find the probability that you would have a banana, then an apple, then another banana.
$\frac{3}{12}\times\frac{2}{12}\times\frac{1}{12}$
$\frac{3}{12}\times\frac{5}{11}\times\frac{2}{10}$
$\frac{3}{12}\times\frac{5}{12}\times\frac{3}{12}$
$\frac{3}{12}\times\frac{5}{11}\times\frac{3}{10}$
3. Multiple Choice
30 seconds
1 pt
There are 10 blue socks and 12 brown socks in a drawer. Find the probability of reaching in and getting two blue socks without looking.
$\frac{10}{22}\times\frac{10}{21}$
$\frac{10}{22}\times\frac{9}{21}$
$\frac{10}{22}\times\frac{10}{22}$
$\frac{10}{22}\times\frac{12}{21}$
4. Multiple Choice
30 seconds
1 pt
Team A, Team B, Team C, Team D, and Team E are all competing in a relay race. Starting positions are chosen at random. Find the probability that Team B will start in the 1st position and Team E will start in the 2nd position.
$\frac{1}{5}\times\frac{1}{5}$
$\frac{2}{5}\times\frac{1}{5}$
$\frac{1}{5}\times\frac{1}{4}$
$\frac{1}{5}\times\frac{2}{4}$
5. Multiple Choice
30 seconds
1 pt
There are 2 blue, 6 green, 5 yellow, 7 purple and 3 blue marbles in a bag. You randomly draw two marbles from the bag without replacing the first one. Find the probability of getting a green marble and then a yellow marble.
$\frac{11}{23}\times\frac{10}{22}$
$\frac{11}{23}\times\frac{10}{23}$
$\frac{6}{23}\times\frac{5}{23}$
$\frac{6}{23}\times\frac{5}{22}$
6. Multiple Choice
30 seconds
1 pt
Find each probability of picking a V, then a K, if you pick a card, do not replace it, and then pick a second card.
$\frac{1}{64}$
$\frac{1}{32}$
$\frac{1}{56}$
$\frac{1}{16}$
7. Multiple Choice
30 seconds
1 pt
Find each probability of picking a R, then another R, if you pick a card, do not replace it, and then pick a second card.
$\frac{1}{28}$
$\frac{1}{32}$
$\frac{1}{16}$
$\frac{11}{28}$
8. Multiple Choice
30 seconds
1 pt
Find the probability of picking a yellow, and then not a yellow, if you pick two marbles without replacing the first.
$\frac{5}{27}$
$\frac{5}{24}$
$\frac{1}{12}$
$\frac{2}{9}$
9. Multiple Choice
30 seconds
1 pt
Find the probability of picking a green and then another green, if you pick two marbles without replacing the first.
$\frac{4}{27}$
$\frac{16}{81}$
$\frac{2}{9}$
$\frac{1}{6}$
10. Multiple Choice
30 seconds
1 pt
Carrie has four different cheerleading tops: a purple tank, a purple sweater, a gold tank, and a gold sweater. What is the probability of Carrie randomly selecting a gold top on Monday, then randomly selecting a purple top on Tuesday, if she doesn't wear the same thing two days in a row?
$\frac{1}{4}$
$\frac{1}{3}$
$\frac{1}{2}$
$\frac{4}{7}$
11. Multiple Choice
30 seconds
1 pt
The teacher of a class that contains 12 boys and 16 girls needs to pick two volunteers. She randomly selects one student, and then selects another student from the class. What is the probability that she picks two girls?
$\frac{20}{63}$
$\frac{16}{49}$
$\frac{1}{256}$
$\frac{15}{49}$
12. Multiple Choice
30 seconds
1 pt
Find the probability of getting not white on the first spinner and a y on the second spinner.
$\frac{6}{25}$
$\frac{3}{10}$
$\frac{4}{15}$
$\frac{2}{5}$
13. Multiple Choice
30 seconds
1 pt
In a game of checkers, there are 12 red pieces and 12 black pieces. Julio is setting up the board to begin playing. What is the probability that the first two checkers he pulls from the box at random are red followed by a black?
$\frac{1}{4}$
$\frac{12}{46}$
$\frac{1}{144}$
$\frac{11}{46}$
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