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  A student believes that toast is more likely to land buttered side down when it falls to the ground. He conducts... Read More

A coin is tossed by students in a simple experiment. Matthew tosses the coin 6 times, Mark 6 times, Luke 6 times,... Read More

  A student is driven through Dublin and records whether he gets a “red” or “green” light at each set of traffic... Read More

Three children are playing different games. The first child is rolling a fair six-sided die and needs to get a ‘6.’ The... Read More

An insurance company is calculating the risk of a fire breaking out in a factory during the next 365 days. It also... Read More

A student living in Ireland picks a day at random from the calendar. Is it likely or unlikely that the day will... Read More

Compute (i.e., simplify into a single term) the following expression, where $k$ and $i$ are nonzero natural numbers:   $$\binom{k}{i-1} + \binom{k}{i}$$... Read More

A researcher has 7 distinct books but wants to place only 5 of them on a shelf (as illustrated in the figure... Read More

A manager is forming a team of 11 players. She has 20 players in her club to choose from, but there is... Read More

A student has 6 distinct books on a bookshelf. These books can be arranged in many ways. One such arrangement is shown... Read More