Concept explainers
A grandmother says her grandson is two years older than her granddaughter and that together, they are at least 12 years old. How old are her grandson and granddaughter?
To calculate: The age of the granddaughter and grandson.
Answer to Problem 21P
The age of granddaughter is more than or equal to 5 years and age of grandson is more than or equal to 7 years.
Explanation of Solution
Given information: The grandson is 2 years older than the granddaughter and together they are at least 12 years old.
Calculation:
Let, the age of granddaughter be x years.
The grandson is 2 years older than her.
Total age of them is
Together they are at least 12 years old.
So, the age of granddaughter is more than or equal to 5 years and the age of grandson is more than or equal to 7 years.
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