emmacardona emmacardona 03-03-2020 Mathematics contestada Out of 40 students, 2 earned an A,12 earned a B, 6 earned a C and 20 earned a D or an F. What percent of students earned B? A jar is filled with buttons of various colors. If the jar has a total of 620 buttons and 20% of the buttons are yellow buttons are in the jar?