Helo can anyone help with this please

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?

Me. i can't figure out this question. give an explanation too. .

Factor the polynomial. b^2 + 4b + 4