70 ounces or 4.375 Pounds. (They weigh the same)
Explanation:
First off all, lets convert everything to improper fractions. Two pounds converted into a fraction would be 2/1. 1 3/4 would be 7/4. After converting the fractions of pounds, we add them. 2/1 + 7/4. Since they have different denominators, we have to find the Lowest Common Multiple which would be 4. Leave the right side alone and multiply 4 to your left denominator and numerator. That would leave you with 8/4 + 7/4. Adding them up, you would get 15/4. Divide that, and you should get 3 3/4 Pounds. Convert that into ounces. (16 ounces = 1 Pound) and you should get 60 ounces. Add the 10 ounces from the sentence and you should get 70 ounces
