Answer:
Hey mate!
3 offsprings will have brown eyes!
When crossing using the Punnett Square, we get the following results:-
BB, Bb, BB, Bb
Bb, bb, Bb, bb
BB, Bb, BB, Bb
Bb, Bb, Bb, bb.
That is:-
Blue, Blue, Blue, Blue
Blue, Brown, Blue, Brown
Blue, Blue, Blue, Blue
Blue, Blue Blue, Brown.
So, as you can see, we got 3 offsprings having brown eyes.