Average Problems( Week 21 Practice) 1. The average of a list of 4 numbers was 26. After two numbers were added to the list, the average became 32. What was the average of the two numbers that were added to the list? 2. The sum of the ages of Niconia and Jessica is 14, the sum of the ages of Niconia and Helen is 18 and the sum of the ages of Jessica and Helen is 14. How old is Helen? 3. The average of 9 numbers is 15. Suppose 35 is added the group. What is the new average of all the numbers? 4. There are 73 marbles in a red bag and 14 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. Emily's average score for the first 4 math exams is 85. The average for all 5 math exams is 83. What is the score of her last math exam? |