In a survey, 250 adults and children were asked whether they know how to
swim. the survey data are shown in the relative frequency table.

what percentage of the people surveyed cannot swim?

Let w=23 . what is the value of w + 45 ?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Can someone me i’m confused. will give brainliest and a whole bunch of points