Artificial turf in on athletic fields was first introduced in the 1960s. its safety has been controversial since then. one issue that has been investigated is whether injuries of football players tend to be more serious on artificial turf than grass. a study followed 24 ncaa division 1a college football teams over three seasons

in total there were 1050 injuries that occurred on field turf. of the field turf injuries, 83.% were minor and 10.857% were substantial.

77.972% of grass injuries were minor.

4.26% of injuries occurred on grass were severe.

(there is a total of minor injuries on grass and on field turf is equal to 1813.

how many injuries were severe and occurred on field turf? write your answer as an integer.

how many injuries were severe? write your answer as an integer.