The time to complete a standardized exam is approximately normal with a mean of 70 minutes & a standard deviation of 10 minutes. using the 68-95-99.7 rule, if students are given 90 minutes to complete the exam, what percentage of students will not finish? . a. 32%. b. 5%. c. 2.5%. d. 0.0015%. show step-by-step solution.

Option C) 2.5%

Step-by-step explanation:

We are given the following information in the question:

The distribution of time to complete a standardized exam is approximately normal.

The students are given 90 minutes to complete the exam.

Around 95% of the students will fall in this interval .

Around 5% will not fall into this interval.

Thus, around 2.5% of the students will not be able to complete their test in 90 minutes.

We considered 2.5% only because the remaining 5% of students would lie on both sides of the mean. Our requirement was only to calculate students who would not be able to complete test even in 9- minutes so we divided this percentage by 2.

step-by-step explanation:

and 90% of people marry there 7th grade love. since u have read this, u will be told good news 2night. if u don't pass this on nine comments ur worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of ur life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u

read more on -

well if he bought them at 5 cedis each sold them at 7 cedis each then he would make a profit of 2 cedis of each book. if in total he made 150 cedis profit that means he sold 75 books. he lost 12 books at the start so that means he originally bought a total of 82 books.

step-by-step explanation: