In 1949, what term did the billboard charts uses to replace "race records"?

Answer: rhythm and blues    race records were musical records sold to african americans from  1920 until 1940. these included race music, and varied african-american musical genres like blues, jazz, gospel music, blues, jazz, and combos.  race records were called as such since they cater to african americans. later, however, white americans gradually began to patronize race records as well.  in 1949, billboard charts used rhythm and blues  to replace "race records.”