449MathematicsMedium
Combine mean calculated by different given mean is ________?
An1x1 + n2x2x + ________ nuxu/x1 + x2 + ____ x4
B∑n1x/x1
Cn1x1 + n2x2x + ________ nuxu/n1 +n2 + ___ + nu
Correct answer
C. n1x1 + n2x2x + ________ nuxu/n1 +n2 + ___ + nu
Explanation
The correct answer is n1x1 + n2x2x + ________ nuxu/n1 +n2 + ___ + nu.