Assuming years in A2:A30 and months in B2:B30

MAX
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=SUMPRODUCT(MAX((A2:A30)+((B2:B30)/12)))
will give for example 5.83

=MAX(A2:A30)&" Yr(s) &
"&(12*MOD(SUMPRODUCT(MAX((A2:A30)+((B2:B30)/12))),1))&" Mths"
will give for example 5 Yrs & 10 Mths


MIN
=====================================
=SUMPRODUCT(MIN((A2:A30)+((B2:B30)/12)))
will give for example 1.25

=MIN(A2:A30)&" Yr(s) &
"&(12*MOD(SUMPRODUCT(MIN((A2:A30)+((B2:B30)/12))),1))&" Mths"
will give for example 1 Yr(s) & 3 Mths

Assumes no blanks in your data.


AVG
=====================================
=AVERAGE(A2:A30)+(AVERAGE(B2:B30)/12)
will give for example 3.52

=FLOOR(AVERAGE(A2:A30)+(AVERAGE(B2:B30)/12),1)&" Yr(s) &
"&TEXT((12*MOD(AVERAGE(A2:A30)+(AVERAGE(B2:B30 )/12),1)),"0.0")&" Mths)"
will give for example 3 Yrs & 6.2 Mths

--
Regards
Ken....................... Microsoft MVP - Excel
Sys Spec - Win XP Pro / XL 97/00/02/03

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It's easier to beg forgiveness than ask permission :-)
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"Tammi" wrote in message
...
I am trying to find the lowest, highest, and average age based on a large
list. The ages are in terms of years and months, and do not rely on
birthdates.
A B
Years Months
1 2 10
2 5 6
3 4 8
4 2 9

Is this possible??
Thanks