ASVAB Practice Math Questions

Category - Math - Hard

Start a Study Session Sign up for Question of the Day

The average(arithmetic mean) of eight numbers is 12.5. When one number is discarded, the average of remaining numbers becomes 12.0. What is the discarded number?

10.5
12.0
12.5
16.0

Explanation

Answer D The average of eight numbers is 12.5. Total of 8 numbers = 12.5 X 8 = 100
Average of 7 numbered is 12 . Total of 7 number = 12 x 7 = 84
Hence the eighth number = 100-84 = 16

Key takeaway: GMAT always refers to an average as average (arithmetic mean) The average ( arithmetic mean ) of a set of numbers is their sum divided by the number of numbers in the set. For average problems, think Total divided by number of items.

Previous Next

Was this helpful? Upvote!

Start a Study Session Sign up for Question of the Day

Most popular on PracticeQuiz

186 votes

An 8-year-old boy named Albert has a 10-year-old brother named Benny. Benny joins the service at 20 leaving Albert feeling bitter that he no longer has a brother to look up to. After 7 years, Albert is finally ready to make up with Benny who has been out of the service for 5 years. How old is Albert now? GED Exam Prep: Math
164 votes

You are attempting to gather information from a patient, but they are having a hard time trying to communicate since they were hit in the throat by a baseball bat. What is the function of the vocal cords? NREMT Advanced EMT
156 votes

Using motivation from ‘within’ is called ______________. CPCE Exam Prep
146 votes

The lymphatic system contains four organs: Medical Coding Exam Prep
104 votes

“A set of specialized organizational capabilities for providing value to customers in the form of services” is the official definition of: IT Service Management Foundation Practice Test

ASVAB Practice Math Questions

Top questions

Related questions

Most popular on PracticeQuiz

Ad-Blocker not supported

ASVAB Practice Math Questions

Top questions

Related questions

Most popular on PracticeQuiz