When playing American roulette the croupier attendant spins

When playing American roulette, the croupier (attendant) spins a marble that lands in one of the 38 slots in a revolving turntable. The slots are numbered 1 to 36, with two additional slots labeled 0 and 00 that are painted green. Consider the numbers 0 and 00 as neither even nor odd. Half the remaining slots are colored red and half are black. Assume a single spin of the roulette wheel is made. Find the probability\' of the marble landing on a 00 or even slot. The probability of the marble landing on a 00 or even slot is (Type an integer or a simplified fraction.)

Solution

there are a total of (36/2) = 18 even slots

P(even or 00) = (18 + 1) / 38 = 0.5