Answer:
0.5.
Step-by-step explanation:
Number of red marbles = 50
Yellow marble = 40
Green marble = 10
Total number of marble = 50+ 40 + 10 = 100
Probability of getting yellow marble =
= 0.4
Probability of getting green marble =
= 0.1
Probability of getting either red or green marble = 0.4 + 0.1 = 0.5
Hence, the required probability is equal to 0.5.
Answer:
This is a response bias
Step-by-step explanation:
Response bias is a general term for a wide range of tendencies for participants to respond inaccurately or falsely to questions. These biases are prevalent in research involving participant self-report, such as structured interviews or surveys. Response biases can have a large impact on the validity of questionnaires or surveys.
This is exactly what happens here in the excercise, the result of the poll do not match the vote count, both results do not match, therefore, we can see that a lot of people lied in the poll or simply did not answer it very well.
Answer:
Perry is correct, she covered the greatest area = 18 square units.
Step-by-step explanation:
Looking at the attached diagram, the shapes are rectangular and they are on grid or graph
Note that on a graph:
1 square box = 1 unit
Area of rectangle = Length × Width
For Karina
The Width = 3 units
The length = 4 units
The area which Karina covered = 3 units × 5 units
= 15 square units
For Perry
The Width = 9 units
The length = 2 units
The area perry covered = 9 units × 2 units
= 18 square units
Therefore, Perry is correct, she covered the greatest area = 18 square units.