3+a+3+2a+3/3평균은a+3분산은(3-a-3)제곱+(a+3-a-3)제곱+(2a+3-a-3)제곱을3(변수갯수)으로나눈것이24이므로정리하면((-a)제곱+(a)제곱)/32a제곱/3=24답6
[무물보AI] 답변 로딩중...