Question

What is the mean of the set of numbers? {–9, –8, 4, –1} A. –5.5 B. –3.5 C. –2.8 D. 14

Answer 1

Mean = (- 9 - 8 + 4 - 1) / 4
= (- 14) / 4
= - 3,5

Answer : B

Answer 2

`Formula\ for mean=(sum\ of\ numbers)/(amount\ of\ numbers)\\\\ Mean=(-9-8+4-1)/(4)=(-14)/(4)=-3,5\\\\Mean\ is\ equal\ to\ -3,5.`