The average span of a generation in your family can be calculated by finding the difference in years between each generation and then taking the average of those differences.
To find the span between you and your mother, subtract your mother's birth year (1977) from your birth year (2005): 2005 - 1977 = 28 years.
To find the span between your mother and your grandmother, subtract your grandmother's birth year (1953) from your mother's birth year (1977): 1977 - 1953 = 24 years.
Now, we have the spans of two generations: 28 years and 24 years.
To find the average, we add the two spans together and divide by the number of spans (which is 2 in this case):
(28 + 24) / 2 = 52 / 2 = 26 years.
Therefore, the average span of a generation in your family is 26 years. This means that, on average, there is a 26-year age difference between you, your mother, and your grandmother.
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