X/4+10=1 what’s does x equal

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Find the solution of this system of equation -7x+y=-20 9x-3y=36