Evaluating two colums in range

Hi Guys,

Can anybody help me on this. I am evaluating two columns:\

Sample:
Col1 | Col2
R | Y
R | N
F | Y
G | Y
R | Y

I need to count all rows that Col1 has an 'R' and Col2 has an 'Y'.
The answer for this is 2.

Can anyone tell what formula or functions should I used?

Thank you so much