If the average of 10,k and 30 is 21. What is the value of k ? A. 20 B. 21 C. 23 D. 24 0 0 votes Article Rating Subscribe Login Notify of new follow-up comments new replies to my comments Label {} [+] Name* Email* Label {} [+] Name* Email* 0 Comments Oldest Newest Most Voted Inline Feedbacks View all comments