Questions: 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. Assume a single spin of the roulette wheel is made. Find the probability of winning with the given bet.
An example of a five-number bet is betting that the marble will land in a slot numbered 2, 3, 4, 5, or 6.
The probability of winning with the given five-number bet is
(Type an integer or a simplified fraction.)
Transcript text: 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. Assume a single spin of the roulette wheel is made. Find the probability of winning with the given bet.
An example of a five-number bet is betting that the marble will land in a slot numbered 2, 3, 4, 5, or 6.
The probability of winning with the given five-number bet is $\square$
(Type an integer or a simplified fraction.)
Solution
Solution Steps
Step 1: Identify the Subset S
The subset S includes the slots: [2, 3, 4, 5, 6].
Step 2: Calculate the Size of S (|S|)
The size of the subset S (|S|) is: 5.
Step 3: Compute the Probability
The probability of winning the bet is the ratio of the number of slots in the subset S to the total number of slots on the wheel (N), which can be expressed as \(P = \frac{|S|}{N}\).
Step 4: Simplify the Fraction
Given the total number of slots N = 38 and the size of the subset S (|S|) = 5, the probability of winning the bet is \(P = \frac{|S|}{N} = \frac{5}{38}\).
Final Answer:
The probability of winning the specified bet in American roulette, rounded to 2 decimal places, is 0.13.