The Speaker took the decision on a petition received from AAP spokesperson and MLA Saurabh Bharadwaj, a statement from the Assembly read.
The disqualification of Bajpai takes effect from May 3 and of Sehrawat from May 6 -- the dates they joined the Bharatiya Janata Party (BJP) and informed the media.
"Consequently, the Gandhi Nagar and Bijwasan seats BJPhave fallen vacant," a statement from the Assembly read.
Goel on August 2 had disqualified rebel AAP MLA Kapil Mishra on the grounds of defection for his association with the BJP.