Determining the probability from the given situation.

A stack of 12 papers contains three "A" papers. If three papers are selected, what is the probability a) All three are "A" papers? b) None are "A" papers?

Determining the probability from the given ball situation.

A box contains 7 red, 3 green and 5 blue balls. a) If one ball is drawn at random, find the probability it is red. b) If two balls are drawn, find the probability both are green c) If two balls are drawn, find the probability one is red and the other is blue d) If two balls are drawn, find the probability both are re ...continues

standard deviation

Find the standard deviation of the data in the given frequency table. A company had 80 employees whose salaries are summarized in the frequency table below. Find the standard deviation. Salary Employees 5001-10000 17 10001-15000 16 15001-20000 20 20001-25000 15 25001-30000 12

Determining the probability from a given situation.

An elevator has 4 passengers and 8 floors. Find the probability that no 2 passengers get off on the same floor considering that it is equally likely that a person will get off at any floor.

probability

A die is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting the given result. More than one two.

64% of the workers at Motor Works are female, while 66% of the workers at City Bank are female.

64% of the workers at Motor Works are female, while 66% of the workers at City Bank are female. If one of there companies is selected at random (assume a 50-50 chance for each), and then a worker is selected at random, what is the probability that the worker will be female? Express as a percentage

Using combinations to determine the all possible number of ways.

An award presentation has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia and Paul. In how many ways can the awards alternate between men and women with the first award being presented to a woman?

Find the mean of the group data

using the employment information in the table on Alpha Corporation, find the mean for the grouped data. Years of service Frequency 1-5 5 6-10 20 11-15 25 16-20 10 21-25 5 26-30 3

Determining the probability from the given situation.

An elevator has 4 passengers and 8 floors. Find the probability that no 2 passengers get off on the same floor considering that it is equally likely that a person will get off at any floor.

Find the probability of the result using the normal curve approximation to the binomial distribution.

A 56-question multiple choice test has 4 possible answers for each question and a student chooses the answers to each problem at random. A student selects 16 correct answers. Find the probability of the result using the normal curve approximation to the binomial distribution.