ACT SAT PREP - Arithmetic Mean

The video tutorial humorously introduces the concept of arithmetic mean, explaining it as the average of a set of numbers. The instructor uses a relatable example involving multiples of 10 from 10 to 190, demonstrating how to calculate the average by summing the numbers and dividing by the count. A quick calculation method is also shared, highlighting a pattern in the numbers. The tutorial concludes with a humorous note, emphasizing the learning point.

What is the arithmetic mean commonly referred to as?

• Range

• Average

• Mode

• Median

How do you calculate the arithmetic mean of 10, 20, and 30?

• Add the numbers and divide by 3

• Multiply the numbers and divide by 3

• Subtract the smallest from the largest

• Add the numbers and divide by 2

What is the first step in finding the arithmetic mean of multiples of 10 from 10 to 190?

• Multiply all numbers together

• Add all the multiples of 10

• Subtract 10 from 190

• Divide 190 by 10

What is the total sum of all multiples of 10 from 10 to 190?

• 1800

• 1900

• 2100

• 2000

How many numbers are there in the sequence of multiples of 10 from 10 to 190?

• 18

• 21

• 19

• 20