What are the odds of my core family, 3/4 of us have a birthday on the 24th of the month?

Question

Update:

Im april 24

my sister january 24

my dad march 24

my mom july 9

thats all of us

Answer 1

We are a family of 10... 

3 January birthdays 

4 February birthdays 

1 March birthday 

2 July birthdays

Answer 2

I was born June 24 but I'm not in your family, so I'd say pretty good.