Question: what is the average ( arithmetic mean ) of the numbers 21 , 22 , 23 , 23 , 24 , and 25 ?
A) 23.0
B) 22.5
C) 21
D) 24
E) 23
Correct answer: E
Grade: 6 | Topic: Statistics and Probability | Difficulty: Easy | Standard: 6.SP.B.5.c