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Average Height

If the heights of three people are 5’8”, 5’2”, and 6’2”, what is their average height?

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A standard deck of 52 cards contains 13 cards each from the four suits: spades, clubs, diamonds and hearts. If two cards are randomly picked without replacement, what is the probability that they are both diamonds?

Fahrenheit to Celsius

If the temperature drops by 18o Fahrenheit in a given day, how much did it drop in degrees Celsius?

Mean and Standard Deviation

If the mean and standard deviation of the data set {12,14,19,x} are 15 and √26, respectively, x = ?

Call It In The Air

What is the probability that a fair coin will show “heads” 2 out of 4 times?

Best of a Series

Two teams are playing a best-of-five series, which ends as soon as either team wins three games. If the two teams are equally likely to win a game, regardless of the outcomes of the others, what is the probability that the series ends after the first three games?

Median of Four Values

If the mean of 15, x, 17 and 12 is 15, what is the median of these four values?

Trigonometric Identities

Which of the following expressions can be simplified such that the result is equal to 1?

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What is the value of 10-2 + 10-3 + 10-4?