# Question: Scores on a marketing exam are known to be normally

Scores on a marketing exam are known to be normally distributed with mean and standard deviation of 60 and 20, respectively.

a. Find the probability that a randomly selected student scores between 50 and 80.

b. Find the probability that a randomly selected student scores between 20 and 40.

c. The syllabus suggests that the top 15% of the students will get an A in the course. What is the minimum score required to get an A?

d. What is the passing score if 10% of the students will fail the course?

a. Find the probability that a randomly selected student scores between 50 and 80.

b. Find the probability that a randomly selected student scores between 20 and 40.

c. The syllabus suggests that the top 15% of the students will get an A in the course. What is the minimum score required to get an A?

d. What is the passing score if 10% of the students will fail the course?

**View Solution:**## Answer to relevant Questions

Average talk time between charges of a cell phone is advertised as 4 hours. Assume that talk time is normally distributed with a standard deviation of 0.8 hour. a. Find the probability that talk time between charges for a ...A new car battery is sold with a two-year warranty whereby the owner gets the battery replaced free of cost if it breaks down during the warranty period. Suppose an auto store makes a net profit of $20 on batteries that stay ...Let X be exponentially distributed with ƛ = 0.5. In addition to providing the answer, state the relevant Excel commands.a. P(X ≤ 1)b. P(2Motorists arrive at a Gulf station at the rate of two per minute during morning hours. Assume that the arrival of motorists at the station follows a Poisson distribution. In addition to providing the answer, state the ...Suppose that the average IQ score is normally distributed with a mean of 100 and a standard deviation of 16. In addition to providing the answer, state the relevant Excel commands.a. What is the probability a randomly ...Post your question