10 Jenny has 12 marbles. (1)/(4) of these 12 marbles are large. The rest of these 12 marbles are small. Each large marble has a weight of 70 grams. Each small marble has a weight of 50 grams. Work out the total weight of the 12 marbles.

# Explanation:## Step1:First, we need to find out how many large marbles Jenny has. Since of the 12 marbles are large, we multiply 12 by .### ## Step2:Next, we find out how many small marbles Jenny has. Since the rest of the 12 marbles are small, we subtract the number of large marbles from 12.### ## Step3:Now, we calculate the total weight of the large marbles. Since each large marble weighs 70 grams, we multiply the number of large marbles by 70.### grams## Step4:Then, we calculate the total weight of the small marbles. Since each small marble weighs 50 grams, we multiply the number of small marbles by 50.### grams## Step5:Finally, we add the total weight of the large marbles to the total weight of the small marbles to get the total weight of the 12 marbles.### grams# Answer: The total weight of the 12 marbles is 660 grams.