Well, baby's start teething around 3-12 months old, so they should have a few teeth by then.
There are 5 numbers: 0,1,2,3,4.
m = 5, n = 3;
The probability of success:
P ( A ) = m / n = 3 / 5 = 0.6, or 60 %.
Answer: D) 60%
I think it depends on what it is about.. Did your teacher give you a punnett square or anything like that?
