The average (arithmetic mean) of 5,10,15 and x is 20. What is the value of x? July 11, 2021 / By Preparation Point / ASF Past papers Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn 10 15 20 30 50 That makes it 4 x 20 to get the total sum which is 80 80=5+10+15+x 80–30=x 50=x Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn