The mean of following distribution is 18 .The frequency f in the class interval 19 and 21 is missing. Determine f. The mean of following distribution is 18 .The frequency f in the class interval 19 and 21 is missing. Determine f. November 26, 2020 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related