To find the mass of one tennis ball, you need to divide the total mass by the number of balls.
Given that the total mass of the three balls is 6 3/10 grams, you first convert the mixed number into an improper fraction:
6 3/10 = (6 * 10 + 3) / 10 = 63 / 10 grams.
Now, divide this by 3:
Now, convert it back to a mixed number:
Thus, the mass of one tennis ball is