Answer:
Number of students in each class:
A → 41
B → 38
C → 40
Step-by-step explanation:
Let A, B and C be the number of students in classes A, B and C respectively
From the statements given
A = B + 3 → B = A - 3
B = C - 2 → C = B + 2 = A - 3 + 2 = A - 1
A + B + C = 119
⇒ A + (A - 3) + (A - 1) = 119
⇒ A + A - 3 + A - 1 = 119
⇒ 3A - 4 = 119
⇒ 3A = 119 + 4 by adding 4 to both sides
⇒ 3A = 123
⇒ A = 123 / 3 divide both sides by 3
⇒ A = 42
B = A - 3 = 41 - 3 = 38
C = B + 2 = 38 + 2 = 40
