Average Problems( Week 21 Practice) 1. The average of a list of 4 numbers was 36. After two numbers were added to the list, the average became 37. What was the average of the two numbers that were added to the list? 2. The sum of the ages of Emily and Alice is 14, the sum of the ages of Emily and Anne is 14 and the sum of the ages of Alice and Anne is 12. How old is Anne? 3. The average of 9 numbers is 13. Suppose 33 is added the group. What is the new average of all the numbers? 4. There are 32 marbles in a red bag and 31 marbles in a blue bag. How many marbles need to be moved from the red bag to the blue bag, so that there will be twice as many marbles in the blue bag as in the red bag? 5. Nancy's average score for the first 3 math exams is 87. The average for all 4 math exams is 86. What is the score of her last math exam? |