the average age of 5 people is 40 years, if the ages of twins added to it the average rises by 2. find the age of the twins?
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The twins are 5 year old. What you have to do first is think about what average means. To find out the average age you add the ages up and divide by the amount of people but to work out the twins age, you do the opposite. You do 2 (the number the average age increased by) multiplied by 5 (the number of people) which is 10. It says twins so there are two people; you divide the last result by two to find out their ages.
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