What is two plus two plz help

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers