Question

In 1980 (before the era of in-vitro fertilization), there were 3,612,258 births in the United States (according to the U.S. Census Bureau), of which 68,339 births were to twins and 1,337 births were to triplets or more.1. What was the probability of having multiples (twins or more) in 1980?

Answer 1

There was a 1.93% probability of having multiples (twins or more) in 1980.

Explanation:

There were 3,612,258 births in the US in 1980.

Of those,

68339 + 1337 = 69676 were multiplies.

So

What was the probability of having multiples (twins or more) in 1980?

`P = (69676)/(3612258) = 0.0193`

There was a 1.93% probability of having multiples (twins or more) in 1980.