we are given
A jar contains 4 red marbles numbered 1 to 4 and 10 blue marbles numbered 1 to 10
so, total number of marbles =10+4=14
the number of marble that is red or odd number=2
so, the probability of the marble is red or odd number is

the probability the marble is blue or even numbered
= 1- P( the marble is red or odd number)
so, we get
the probability the marble is blue or even numbered is


...............Answer
I think it's 30 seconds but I didn't understand the question well so don't quote me...