If Σ fixi = 75 and Σ fi = 15, then find the mean x̅.

v. If Σ f_ix_i = 75 and Σ f_i = 15, then find the mean x̅.

Ans.
Mean (x̅)	=	Σ fixi
		Σ fi
∴ x̅	=	75
		15
∴  x̅ find the mean x\bar sample space S.	=	5