2. A spinner labeled 1 to 9 gives the numbers 2, 5, 6, and 7 a 1/5
chance of being landed upon. The chance of landing on the
other numbers is equal.
■ A) If the spinner is spun 1500 times, how many times do you expect it to land on the 6?
– Since the six has a probability of 1/5
– Multiply 1500 times 1/5
– ANSWER: 300
3. A spinner labeled 1 to 9 gives the numbers 2, 5, 6, and 7 a 1/5
chance of being landed upon. The chance of landing on the
other numbers is equal.
b) Find the probability of the other numbers.
P(2) = 1/5
P(5) = 1/5
P(6) = 1/5
P(7) = 1/5
P(2) + P(5) + P(6) + P(7) = 4/5
That leaves 1 – 4/5 or 1/5 as the probability for the remaining numbers.
Since there 5 other numbers, 1/5 ÷ 5 = 1/25
The other numbers have a 1/25 chance of occurring.