Answer:
There was a 1.93% probability of having multiples (twins or more) in 1980.
Step-by-step 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?
[tex]P = \frac{69676}{3612258} = 0.0193[/tex]
There was a 1.93% probability of having multiples (twins or more) in 1980.