Average Problems( Week 21 Practice) 1. The average of a list of 4 numbers was 34. After two numbers were added to the list, the average became 35. What was the average of the two numbers that were added to the list? 2. The sum of the ages of Morgan and Martha is 11, the sum of the ages of Morgan and Sofia is 14 and the sum of the ages of Martha and Sofia is 13. How old is Morgan? 3. The average of 6 numbers is 10. Suppose 24 is added the group. What is the new average of all the numbers? 4. There are 26 marbles in a red bag and 46 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. Jane's average score for the first 5 math exams is 86. The average for all 6 math exams is 88. What is the score of her last math exam? |