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4/9 (4 out of 9) because you add them all together then count the number of blue marbles then since you put back the first marble, the dominator is still the same
25% because 19+57= a total of 76 students and the percentage of 19 out of 76 is 25%.
19/76= 0.25
Answer:
23/2
Step-by-step explanation:
1. Calculate the sum (Subtract)
2. Reduce the numbers
23/2