Final answer:
The difference between the mass of the two watermelons is 1.7 kilograms.
Step-by-step explanation:
To find the difference between the mass of the two watermelons, we need to subtract the mass of the smaller watermelon from the mass of the larger watermelon. The difference is obtained by the equation:
Difference = Mass of larger watermelon - Mass of smaller watermelon
Plugging in the given values, we have:
Difference = 9.3 kg - 7.6 kg = 1.7 kg.
Therefore, the difference between the mass of the two watermelons is 1.7 kilograms.