Layla arked a group of students to chooue their favorite type of exerche from the choices of jogging, biling, and wwimming. The rules of the survey are shown in the graph. Favorite Types of exercise 20 Vurbe orders li AD Jogging Biking Swimming Type of Exercise Based on the graph, how many students in a class of 420 students would be expect to choose biking or mwimming as their favorite type of cherche​

the answer is 21%.

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)