SOLUTION: The average age of Ramona's three cousins is 13. One of her cousins is 7 years old and another is 15 years old.
How old is the third cousin?
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How old is the third cousin?
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Question 1112037: The average age of Ramona's three cousins is 13. One of her cousins is 7 years old and another is 15 years old.
How old is the third cousin? Found 2 solutions by ikleyn, MathTherapy:Answer by ikleyn(52802) (Show Source):
= 13 <<<---=== I edited my typo after the @MathTherapy post. Thanks @MathTherapy for noticing the typo !
7 + 15 + x = 13*3
22 + x = 39
x = 39 - 22 = 17.
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The average age of Ramona's three cousins is 13. One of her cousins is 7 years old and another is 15 years old.
How old is the third cousin?
