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Math Unit 4 Quiz
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Describing events, simple probability, multiplication rule
Terms in this set (15)
Intersection (in this example students that like to draw AND sing)
What does the following symbol represent? (In this example D represents drawing and S represents singing)
Union (in this example all the students that like to draw OR sing)
What does the following symbol represent? (In this example D represents drawing and S represents singing)
Complement (in this example all the students that did NOT draw)
What does the following symbol represent? (In this example D represents drawing)
1, 4, 6, 9, 10 (all the students that had an "x" in the act column)
Using the image, list all the outcomes for A (act): (there are 5 answers)
3, 4, 5, 7, 8, 10 (all the students that did NOT have an "x" in the dance column)
The question is on the image: (there are 6 answers)
3, 5 (all the students that do BOTH draw AND sing)
The question is on the image: (there are 2 answers)
6, 10 (all the students that do NOT draw OR sing)
The question is on the image: (there are 2 answers)
Take the number of ways an event can occur and DIVIDE it by the total number of outcomes
How do you calculate simple probability?
2/10 = 1/5 (2 students write and there are a total of 10 students)
The question is on the image:
3/10 (3 students are in this category and there are a total of 10 students)
The question is on the image:
8/10 = 4/5 (8 students are in this category and there are a total of 10 students)
The question is on the image:
1/6 x 1/6 = 1/36 (there is 1 four on the die and a total of 6 sides)
You roll a regular 6 sided die. What is the probability of rolling a 4, and then rolling 4 again?
3/7 x 1/6 = 3/42
You open a bag of Skittles with a total of 7 Skittles. It has 2 Red, 3 Orange, 1 Blue, and 1 Green. What is the probability of selecting an orange Skittle, eating it (without replacement), and then selecting a green Skittle?
3/7 x 1/7 = 3/49
You open a bag of Skittles with a total of 7 Skittles. It has 2 Red, 3 Orange, 1 Blue, and 1 Green. What is the probability of selecting an orange Skittle, PUTTING IT BACK (replacing it), and then selecting a green Skittle?
The probability of NOT replacing the skittle (3/42 = .07 and 3/49 = .06)
Was the probability greater when you replaced the orange skittle or when you did NOT replace the skittle?
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Verified questions
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An animal shelter currently only has 30 dogs and 20 cats. What is the ratio of cats to animals?
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Alma borrows money from her mom to buy a $150 bike. She gives her mom$40 at the time of purchase and continues to pay her $10 each month until the bike is paid in full. Alma wrote this equation to represent the amount y that she will have paid her mom after x months. Equation: y = 40x + 10 Is her equation correct? How did she get that equation? If it is not correct, write a correct equation.
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The number of AR points Jane earned the first semester is equal to the sum of 4 hundred thousands, 2 thousands, 7 hundreds, and 9 ones. The number of AR points Jane earned can be expressed as what number in standard form? A 42,790 B 402,709 C 420,079 D 42,709