Answer:
24
Step-by-step explanation:
Percentage of students that didn't solve a problem = 10% of the students.
Percentage of students that solved it wrongly = 40% of the students.
Percentage of students that solved it correctly = 100% - 50% = 50% of the total students = 12 students.
Therefore, the total number of students that participated in the work which represents 100% = 2 × 50% of students = 2 × 12
= 24
răspuns:
24
explicație pas cu pas:
procent de elevi care nu au rezolvat o problemă = 10% dintre elevi.
procent de elevi care au rezolvat gresit = 40% din elevi. procent de studenți care au rezolvat corect = 100% - 50% = 50% din totalul studenților = 12 studenți.
prin urmare, numărul total de elevi care au participat la lucrare care reprezintă 100% = 2 × 50% de elevi = 2 × 12 = 24
