2021
Mathematics
POST UTME
A box has 100 blue balls, 50 red balls, 50 black balls, 25% of blue balls and 50% of red balls are taken away.The percentage of black balls at present is
A box has 100 blue balls, 50 red balls, 50 black balls, 25% of blue balls and 50% of red balls are taken away.The percentage of black balls at present is