How to count entries based on two columns (example shown)

[angel1980]

In column D, I want to print the counts in column D, based on entries in column A(Name) and column C(Num). How can I achieve it as one liner in excel? SUMPRODUCT or COUNTIF?

Name ID Num COUNT
Control C 260 2
Control C 260 2
Test C 260 2
Test C 260 2
Control C 261 3
Control C 261 3
Control C 261 3
Test C 261 2
Test C 261 2
Control C 262 3
Control C 262 3
Control C 262 3
Test C 262 3
Test C 262 3
Test C 262 3

[FDibbins]

try this, copied down...
=SUMPRODUCT(($A$2:$A$16=A2)*($C$2:$C$16=C2))

[angel1980]

Amazing! Thanks so much!

[FDibbins]

Happy to help. If this answered your question, please take a moment to mark the thread as "solved" - it helps keep things neet and tidy lol, and consider adding the reputation to those that helped (see points 2 & 3 below)