Answer:
A: 0.1475 , B: 0.3389
Explanation:
a. Probability Refrigerator purchased from store lasts more than 15 years :
Prob(refrigerator purchase from A) and Prob(refrigerator from A life > 15 years) + .........Prob(refrigerator purchase from D) and Prob(refrigerator from D life >15 years)
(0.40x0.1)+(0.25x0.20)+(0.15x0.05)+(0.20x0.25) = 0.04+0.05+0.0075+0.05 = 0.1475
b. Refrigerator last > 15 years given , Probability it is from B :
[ Prob (B Purchase) . Prob (life > 15, given from B) ] / Prob (Life > 15)
P (B/15) = [P(B).P(15/B)] / [P15] {Bayes Theorum}
= [(0.25)(0.20)] / 0.1475 = 0.05 / 0.1475
= 0.3389
Numerous number of consumers or buyers protects a firm from being forced to sell its products at an unfairly low price. This is one of the important reasons that a firm can sell its product at a good price. If the competition increases, then the firm has to beat the competition to get the required price, otherwise it might have to lower its price to hold on to its consumers.
Answer:write out 40 wen you divied
Explanation:
Answer:
The correct option is D) reduce test scores by 4.56 for every school district.
Explanation:
Based on the information in the question, the relationship between test scores and the student-teacher ratio can be mathematically written as follows:
x = 698.9 - 2.28y .................... (1)
Where,
x = test scores
y = student-teacher ratio
The a slope of (-2.28) indicates the amount by which x will change whenever there is a change in y.
Therefore, when there is a decrease in the student teacher ratio by 2 (i.e. y = 2), we will have:
Change in x = -2.28 * 2 = -4.56
The negative sign therefore indicate that the test scores will reduce by 4.56 for every school district. Therefore, the correct option is D) reduce test scores by 4.56 for every school district.
