In a bag, there are 400 marbles. 60 are white, 120 are blue, and the remainder are red. If 20 red marbles are removed, what fraction of the remaining marbles in the bag are not white?
not white: 400-60 = 340
so, after removing 20 reds,
340/(400-20) = 340/380 = 17/19 not white
At the school store, pencils cost $.0.18 and erasers are 6 cents. How much change would you get from a $5 bill if you purchased 7 pencils and 7 erasers?
To find the fraction of the remaining marbles that are not white, we need to first determine the number of red marbles in the bag.
Given that there are 400 marbles in total and we know the quantities of white and blue marbles, we can subtract these from the total to find the number of red marbles:
Total marbles - White marbles - Blue marbles = Red marbles
400 - 60 - 120 = 220
Therefore, there are 220 red marbles in the bag.
Now, we need to determine the number of remaining marbles after removing 20 red marbles.
Remaining marbles = Total marbles - Removed marbles
400 - 20 = 380
So, after removing 20 red marbles, there are 380 marbles remaining in the bag.
To find the fraction of the remaining marbles that are not white, we need to determine the total number of marbles that are not white.
Total marbles that are not white = Remaining marbles - White marbles
380 - 60 = 320
Hence, there are 320 marbles that are not white.
The fraction of the remaining marbles that are not white can be determined by dividing the number of marbles that are not white by the total number of remaining marbles:
Fraction = Marbles that are not white / Remaining marbles
320 / 380 = 8/19
Therefore, the fraction of the remaining marbles in the bag that are not white is 8/19.