One way ..

Assuming source data in cols A to C, from row2 to row100 (say)

Site# is input in E2: 205, in E3: 310, etc

Place in F2, then array-enter (press CTRL+SHIFT+ENTER):
=INDEX($B$2:$B$100,MATCH(MAX(IF($A$2:$A$100=E2,$C$ 2:$C$100)),IF($A$2:$A$100=E2,$C$2:$C$100),0))
Copy F2 down
--
Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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"Igneshwara reddy" wrote:
Site# Serial# No. of times repeated
205 12345 4
205 5678 5
205 54785 7
310 65432 4
310 47859 6

Could you suggest with any formula to count maximum number of times a serial
number has repeated.

For Eg:
Site # Serial#
205 54785
310 47859
In the above case, for site# 205 the maximum repeated serial# is 54785 and
for site# 310 the maximum repeated serial# 47859.

Suggest me with any formula to perform this work.