25e² + n 4= 20edon't know what to do so please help
1 answer:
Answer:
see explanation
Step-by-step explanation:
This is a quadratic equation
Rearrange into standard form : ax² + bx + c = 0 : a ≠ 0
subtract 20e from both sides
25e² - 20e + 4 = 0 ← in standard form
This is a perfect square of the form
(a - b)² = a² - 2ab + b²
25e² = (5e)² ⇒ a = 5e and 4 = 2² ⇒ b = 2, and
- 2ab = - 2 × 5e × 2 = - 20e, hence
25e² - 20e + 4 = (5e - 2)²
⇒ (5e - 2)² = 0 ⇒ e = with multiplicity 2
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Answer:
0.5015 = 50.15% probability that it came from manufacturer A.
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Defective
Event B: From manufacturer A.
Probability a unit is defective:
2% of 43%(from manufacturer A)
1.5% of 57%(from manufacturer B). So
Probability a unit is defective and from manufacturer A:
2% of 43%. So
What is the probability that it came from manufacturer A?
0.5015 = 50.15% probability that it came from manufacturer A.