### Instruction: The average of five weights is 13 grams. This set of five weights is then increased by another weight of 7 grams. What is the average of the six weights?### Response: To find the average of a set of numbers, I need to divide the sum of the numbers by the number of numbers.
The average of the five weights is 13 grams, so the sum of the five weights is 13 times 5, or 65 grams.
When I add another weight of 7 grams, the new sum is 65 plus 7, or 72 grams.