10 hours is equal to 600 minutes. 30 minutes goes into 600 minutes 20 times, but it would be 19 because there is a 30 minute lunch break.
600/30=20
20-1=19
Since there are 50 mouse traps every 30 minutes, we would multiply 50 by 19(the amount of half hours).
50*19=950
So, there are 950 mouse traps in 1 day.