One a tree there are 48 birds. After some time 10 more birds come and sit on the tree and 7 birds fly away. How many birds are there on the tree now?

One a tree there are 48 birds. After some time 10 more birds come and

1.	One a tree there are 48 birds. After some time 10 more birds come and sit on the tree and 7 birds fly away. How many birds are there on the tree now?
A.	51
B.	49
C.	41
D.	None of these
Answer» B. 49