If each match box contains 50 matchsticks, the number of matchsticks required to fill n such boxes is
50 + n
50n
50 ÷ n
50 – n
Step 1: One match box has (50) matchsticks.
Step 2: If there are (n) boxes, we are adding (50) again and again, (n) times.
That looks like repeated addition:
(50 + 50 + 50 + dots) (added (n) times)
Step 3: Repeated addition of the same number is multiplication.
So, total matchsticks = (50 imes n)
Step 4: We usually write this as (50n).
Quick check:
If (n = 1), total = (50 imes 1 = 50) ✔️
If (n = 3), total = (50 imes 3 = 150) ✔️
Therefore, the correct option is: B) (50n)