for 4 afr ,gluster volume info "Number of Bricks" after removing 3rd and 4th bricks,shows "0 x 4 =3" "0 x 4 =2"
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131#gluster volume info

Volume Name: afr40
Type: Replicate
Status: Started
Number of Bricks: 1 x 4 = 4
Transport-type: tcp
Bricks:
Brick1: 172.24.21.131:/data/oct4
Brick2: 172.24.21.132:/data/oct4
Brick3: 172.24.21.133:/data/oct4
Brick4: 172.24.21.134:/data/oct4
131#gluster volume remove-brick afr40 172.24.21.133:/data/oct4 
Removing brick(s) can result in data loss. Do you want to Continue? (y/n) y
Remove Brick successful
131#gluster volume info

Volume Name: afr40
Type: Replicate
Status: Started
Number of Bricks: 0 x 4 = 3
Transport-type: tcp
Bricks:
Brick1: 172.24.21.131:/data/oct4
Brick2: 172.24.21.132:/data/oct4
Brick3: 172.24.21.134:/data/oct4
131#gluster volume remove-brick afr40 172.24.21.134:/data/oct4 
Removing brick(s) can result in data loss. Do you want to Continue? (y/n) y
Remove Brick successful

131#gluster volume info

Volume Name: afr40
Type: Replicate
Status: Started
Number of Bricks: 0 x 4 = 2
Transport-type: tcp
Bricks:
Brick1: 172.24.21.131:/data/oct4
Brick2: 172.24.21.132:/data/oct4