She estimated by rounding 907 -> 900 and 626 -> 630 and when you subtract them, you get 270, which is how she estimated >300 people would arrive in the afternoon
Answer:
3 1/6
Step-by-step explanation:
Mixed number=4 8/10=4 4/5
improper fraction=48/10=24/5
We want to find

, where

is a binomial distribution with

and

. So