In A column I have data from 1 to 100, in B column I have "Yes" or "No".
In C1 I want a formula total of "yes" from Serial (1 to 30) + (41 to 60) + (91 to 100), Similarly in D1 total of "yes" from Serial (31 to 40) + (61 to 90)
what should be the formula ...