a spinner contains four equally shaded areas, as shown below. louise spins the spinner twice. which…

a spinner contains four equally shaded areas, as shown below. louise spins the spinner twice. which probabilities are correct? check all that apply. \\(\\square\\) \\(p(\\text{both green}) = \\frac{1}{16}\\) \\(\\square\\) \\(p(\\text{both blue}) = \\frac{1}{4}\\) \\(\\square\\) \\(p(\\text{first green and then blue}) = \\frac{1}{6}\\) \\(\\square\\) \\(p(\\text{first orange and then blue}) = \\frac{1}{8}\\) \\(\\square\\) \\(p(\\text{first orange and then green}) = \\frac{1}{4}\\)
Answer
Explanation:
First, let's determine the probability of landing on each color. The spinner has 4 equal areas: orange, blue, blue, green. So the probabilities for each color are:
- ( P(\text{orange}) = \frac{1}{4} )
- ( P(\text{blue}) = \frac{2}{4} = \frac{1}{2} )
- ( P(\text{green}) = \frac{1}{4} )
Since the spins are independent, we use the multiplication rule for independent events: ( P(A \text{ and } B) = P(A) \times P(B) )
Step 1: Check ( P(\text{both green}) )
( P(\text{green}) = \frac{1}{4} ), so ( P(\text{both green}) = \frac{1}{4} \times \frac{1}{4} = \frac{1}{16} ). This is correct.
Step 2: Check ( P(\text{both blue}) )
( P(\text{blue}) = \frac{1}{2} ), so ( P(\text{both blue}) = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4} ). This is correct.
Step 3: Check ( P(\text{first green and then blue}) )
( P(\text{green}) = \frac{1}{4} ), ( P(\text{blue}) = \frac{1}{2} ), so ( P(\text{first green and then blue}) = \frac{1}{4} \times \frac{1}{2} = \frac{1}{8} ). The given value is ( \frac{1}{6} ), which is incorrect.
Step 4: Check ( P(\text{first orange and then blue}) )
( P(\text{orange}) = \frac{1}{4} ), ( P(\text{blue}) = \frac{1}{2} ), so ( P(\text{first orange and then blue}) = \frac{1}{4} \times \frac{1}{2} = \frac{1}{8} ). This is correct.
Step 5: Check ( P(\text{first orange and then green}) )
( P(\text{orange}) = \frac{1}{4} ), ( P(\text{green}) = \frac{1}{4} ), so ( P(\text{first orange and then green}) = \frac{1}{4} \times \frac{1}{4} = \frac{1}{16} ). The given value is ( \frac{1}{4} ), which is incorrect.
Answer:
The correct probabilities are:
- ( P(\text{both green}) = \frac{1}{16} )
- ( P(\text{both blue}) = \frac{1}{4} )
- ( P(\text{first orange and then blue}) = \frac{1}{8} )
So the correct options are:
- ( P(\text{both green}) = \frac{1}{16} )
- ( P(\text{both blue}) = \frac{1}{4} )
- ( P(\text{first orange and then blue}) = \frac{1}{8} )