Answer:
7.5$
Step-by-step explanation:
This is because 11.25*3 = 33.75
and 8.25*5 = 41.25
41.25-33.75=7.5
There are four mutually exclusive groups, therefore, the probability of one item being classified into any of the four groups is 1/4 or 0.25.
The expected number of items is calculated as the product of the probability and the total number of observations. For this problem, the probability of an item being classified to group 1 is 0.25 and the total number of observations is 400. Therefore, the expected number of items is

The expected number is
100.
Answer:
Sample response: The Smith family has 2 choices to make, color and style. By the fundamental counting principle, the product of the number of choices of color and style must equal 8. So, there could be 1 color and 8 style choices, 2 colors and 4 styles, 4 colors and 2 styles, or 8 colors and 1 style.
Step-by-step explanation:
Answer:
2..........................
Answer:
28
Step-by-step explanation: