# probability

2. If the probability of seeing moose in a day in a certain region of Alaska is 0.39, what is the probability of not seeing any moose in a day there? Answer: Prob(not seeing any moose) = 1 – Prob(seeing a moose) 1 – 0.39 = 0.61 3.If the odds of winning a raffle are […]

# probability of a spinner

1. Determine the probability that the spinner lands on red. As there are three RED’s on the spins, out of the 8 . The probability that spinner lands on red is 3/8 = 0.375 0.5 0.25 0.33 0.375 0.125 2. Determine the odds against the spinner landing on red. From the above figure There are […]

# Probability MCQ

1. Use the following information to answer THREE parts to this question …. Year 1940 1950 1960 1970 1980 1990 CPI 14.0 24.1 29.6 38.8 82.4 130.7 a. During which decade was inflation the highest, as measured by the percentage change in the CPI? a) 1950’s b) 1960’s c) 1970’s d) 1980’s b. What is […]

# Probability of independent events

1. Give an example of independent events Solution In tossing of a coin twice, the result of the second tossing is not affected by the result of the first toss.  So the results are independent events. 2. A company runs 3 servers, each providing services to 40 computers. For each server, two of its client […]

# Probability worked examples

Probability worked examples 1. Give an example of independent events Solution In tossing of a coin twice, the result of the second tossing is not affected by the result of the first toss.  So the results are independent events. 2. A company runs 3 servers, each providing services to 40 computers. For each server, two […]

# Probability worked examples

Probability worked examples 1. A mini license plate for a toy car must consist of three numbers followed by a letter. Each number must be a 3, 6, or 9. Repetition of digits is NOT permitted. Each letter must be an A, B or C. Use the counting principle to determine the number of points […]

# Chebyshev’s theorem example

Use Chebyshev’s theorem to find what percent of the values will fall between 161 and 229 for a data set with mean of 195 and standard deviation of 17. – Use the Empirical Rule to find what two values 95% of the data will fall between for a data set with mean 106 and standard […]

# Normal Distribution, Statistics problems

Probability 1. According to Investment Digest (“Diversification and the Risk/Reward Relationship”, Winter 1994, 1-3), the mean of the annual return for common stocks from 1926 to 1992 was 15.4%, and the standard deviation of the annual return was 24.5%. During the same 67-year time span, the mean of the annual return for long-term government bonds […]

# Gold Chain Links- Problem of the Week

Bilbo has a gold chain with 20 links. He is staying in town for 20 days at an inn and wishes to pay each day with one gold link. When he cuts the chain, the remaining links looks like the diagram below: The diagram shows 10 links but there are 20 on Bilbo’s chain. If […]