Search for: The variable X takes two values x1 and x2 with frequencies f1 and f2 respectively. If σ denotes the standard deviation of X, then σ2= The variable X takes two values x1 and x2 with frequencies f1 and f2 respectively. If σ denotes the standard deviation of X, then σ2= Af12x12+f22x22f1+f2−f1x1+f2x2f1+f22Bf1f2f1+f22x1−x22Cf1f2f1−f22x1−x22Dnone of these Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:We have, σ2=f1x12+f2x22f1+f2−f1x1+f2x2f1+f22⇒σ2=1f1+f22f12x12+f22x22+f1f2x12+x22−f12x12−f22x22−2f1f2x1x2⇒σ2=f1f2f1+f22x1−x22 Related content Patriotic Slogans by Freedom Fighters of India GK Questions and Answers on Solar System Past Perfect Tense Healthy Food Slogans Application for Bonafide Certificate Format and Samples Past Continuous Tense Leave Application For Teacher What is Surface Tension – Dimensions, Derivations, Causes and Examples Odisha Traditional Dress Official Leave Application Format, Samples