Answer:
1600
Step-by-step explanation:
Do 400 ÷ 0.25 = 1600
0.25 because of the discount
Check by doing 1600 X 0.25 and it should be 400 which it is
Assuming that the balls are not replaced;

= 5/42
(the numbers are decreasing in the denominator as you are presumably taking out the red balls. In the denominator, there is one less ball each time since you took out a red one).
Therefore, the probability of selected 4 red balls consecutively without replacement is 5/42.
Hope I Helped :)
<span>angle = arcsin(5.5/200) = 1.575 degrees</span>
Ya got to go $660 + 7% hours later on $450 hours later 00.578 to finish