First, we need to find the probability, P, that the software is the standard version.
Out of 25,000 units, 5,000 were deluxe. That means the remaining 20,000 were standard. So, 20,000 out of 25,000, or

were standard. That means the probability of selecting a standard one at random is P = 0.8.
Next, we need to find the independent probability that any software box will contain the promotion. We know that 1 in 500 will, or

. That means P = 0.002.
To find the compound probability of these two events, we multiply the probabilities together to get

.
Answer:
The modulus and argument are 2√2 and 3π/4. The polar form is 2√2(cos 3π/4 + i sin 3π/4).
Explanation:
The chemical equations that show a reaction that occurs when someone takes an antacid are;
- HCl + NaHCO₃ -> NaCl + H₂O + CO₂
- 2HCl + CaCO₃ -> CaCl₂ + CO₂ + H₂O
- 2HCl + Mg(OH)₂ -> MgCl₂ + 2H₂O
<h3>What is the correct chemical equation?</h3>
Hydrochloic acid would normally react with the basic substances in the stomach. Now, these substances that react with hydrochloric acid in the stomach are magnesium hydroxide, sodium bicarbonate and calcium carbonate.
Thus, from the above dewscription, the chemical equations that show a reaction that occurs when someone takes an antacid are;
- HCl + NaHCO₃ -> NaCl + H₂O + CO₂
- 2HCl + CaCO₃ -> CaCl₂ + CO₂ + H₂O
- 2HCl + Mg(OH)₂ -> MgCl₂ + 2H₂O
Read more about chemical equations at; brainly.com/question/11231920?source=archive