A jar contains 7 red marbles numbered 1 to 7 and 10 blue marbles numbered 1 to 10. A marble is drawn at random from the jar. Find the probability that the marble is red or odd-numbered. Round your answer to three decimal places.
[tex] |\Omega|=17\\ |A|=\underbrace{7}_{\text{red}}+\underbrace{9}_{\text{odd}}-\underbrace{4}_{\text{duplicate of red and odd}}=12\\\\ P(A)=\dfrac{12}{17}\approx71\% [/tex]
