35 red shirts 55 blue shirts 15 green shirts 65 black shirts 30 white shirts
In total, there are 35+55+15+65+30 = 200 shirts in all.
The proportion of red shirts is equal to the number of red shirts over the total, so
proportion of red shirts = (number of red shirts)/(total) proportion of red shirts = 35/200 proportion of red shirts = 0.175
So 17.5% of the shirts are red. This means that the manager would expect the same proportion or percentage no matter what the new total turns out to be.
