7th
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Mathematics

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Bess Blacketer

4 years

Mathematics

7th

grade

Blue Homework - Probability A

Bess Blacketer

50
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12 questions

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1. Multiple Choice
30 seconds
1 pt
How many total marbles are there?
12
4
8
11
2. Multiple Choice
30 seconds
1 pt
1.What is the probability of drawing a black marble, replacing it, then picking a white(not colored in) marble?
$\frac{2}{12}\times\frac{4}{12}=\frac{8}{144}=\frac{1}{18}$
$\frac{1}{6}\times\frac{1}{6}=\frac{1}{36}$
$\frac{1}{2}\times\frac{1}{4}=\frac{1}{8}$
$\frac{1}{12}\times\frac{1}{12}=\frac{1}{144}$
3. Multiple Choice
30 seconds
1 pt
2.What is the probability of drawing a striped marble, putting it back, and drawing a swirled marble?
$\frac{3}{12}\times\frac{3}{12}=\frac{9}{144}=\frac{1}{16}$
$\frac{1}{12}\times\frac{1}{12}=\frac{1}{144}$
$\frac{1}{3}\times\frac{1}{3}=\frac{1}{9}$
$\frac{1}{4}\times\frac{1}{4}=\frac{2}{8}$
4. Multiple Choice
30 seconds
1 pt
3.What is the probability of drawing 2 consecutive (in a row) white marbles without replacing them?
$\frac{4}{12}\times\frac{3}{11}=\ \frac{12}{132}=\frac{1}{11}$
$\frac{4}{12}\times\frac{4}{12}=\frac{16}{144}=\frac{1}{9}$
$\frac{1}{4}\times\frac{1}{3}=\frac{1}{12}$
$\frac{1}{3}\times\frac{1}{3}=\frac{1}{6}$
5. Multiple Choice
30 seconds
1 pt
5.What is the probability of spinning a square and a triangle?
$\frac{2}{8}\times\frac{2}{8}=\frac{4}{64}=\frac{1}{16}$
$\frac{1}{2}\times\frac{1}{2}=\frac{1}{4}$
$\frac{2}{8}\times\frac{1}{8}=\frac{2}{64}=\frac{1}{32}$
$\frac{2}{8}\times\frac{2}{8}=\frac{4}{16}=\frac{1}{4}$
6. Multiple Choice
30 seconds
1 pt
6.P(Shaded, square, and triangle)
$\frac{4}{8}\times\frac{2}{8}\times\frac{2}{8}=\frac{16}{512}=\frac{1}{32}$
$\frac{1}{2}\times\frac{1}{4}\times\frac{1}{4}=\frac{1}{10}$
$\frac{4}{8}\times\frac{2}{8}\times\frac{1}{8}=\frac{8}{512}=\frac{1}{64}$
$\frac{1}{4}\times\frac{1}{2}\times\frac{1}{2}=\frac{1}{16}$
7. Multiple Choice
30 seconds
1 pt
7.P(shaded circle)
$\frac{3}{8}$
$\frac{4}{8}=\frac{1}{2}$
$\frac{1}{8}$
$\frac{1}{4}$
8. Multiple Choice
30 seconds
1 pt
8.P (shaded triangle)
$\frac{1}{8}$
$\frac{2}{8}=\frac{1}{4}$
$\frac{4}{8}\times\frac{2}{8}=\frac{8}{64}$
$\frac{1}{2}$
9. Multiple Choice
30 seconds
1 pt
9.P (NOT shaded)
$\frac{4}{8}=\frac{1}{2}$
$\frac{1}{4}$
$\frac{1}{8}$
$\frac{8}{8}=1$
10. Multiple Choice
30 seconds
1 pt
10.P (NOT Square)
$\frac{6}{8}=\frac{3}{4}$
$\frac{2}{8}=\frac{1}{4}$
$\frac{3}{8}$
$\frac{1}{8}$
11. Multiple Choice
30 seconds
1 pt
11.P (NOT Triangle and Circle)
$\frac{6}{8}\times\frac{4}{8}=\frac{24}{64}=\frac{3}{8}$
$\frac{2}{8}\times\frac{4}{8}=\frac{8}{64}=\frac{1}{8}$
$\frac{1}{8}\times\frac{1}{8}=\frac{1}{64}$
$\frac{6}{8}\times\frac{1}{4}=\frac{6}{32}=\frac{3}{16}$
12. Multiple Choice
30 seconds
1 pt
12.P (Square and Shaded)
$\frac{2}{8}\times\frac{4}{8}=\frac{8}{64}=\frac{1}{8}$
$\frac{1}{2}\times\frac{1}{4}=\frac{2}{6}=\frac{1}{3}$
$\frac{2}{8}\times\frac{1}{4}=\frac{2}{32}=\frac{1}{16}$
$\frac{1}{4}\times\frac{1}{4}=\frac{2}{8}=\frac{1}{4}$
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