Simple Probability

Front

What is Simple Probability?

Back

Simple Probability is the measure of the likelihood that a specific event will occur, expressed as a ratio of the number of favorable outcomes to the total number of possible outcomes.

Front

What is the formula for calculating the probability of an event A?

Back

The formula is P(A) = \frac{Number of favorable outcomes}{Total number of possible outcomes}.

Front

What is P(not A)?

Back

P(not A) is the probability that event A does not occur, calculated as P(not A) = 1 - P(A).

Front

If a bag contains 6 red marbles and 2 blue marbles, what is the probability of picking a blue marble?

Back

P(blue) = \frac{2}{8} = \frac{1}{4}.

Front

What does it mean if an event is 'Certain'?

Back

An event is 'Certain' if it is guaranteed to happen, with a probability of 1.

Front

What does it mean if an event is 'Impossible'?

Back

An event is 'Impossible' if it cannot happen at all, with a probability of 0.

Front

What is the probability of flipping a coin and getting tails?

Back

P(tails) = \frac{1}{2}.

Front

If the probability of an event is \frac{3}{4}, what is the probability of the event not occurring?

Back

P(not event) = 1 - P(event) = 1 - \frac{3}{4} = \frac{1}{4}.

Front

What is the probability of choosing a pink marble from a bag with 4 pink, 4 blue, and 2 green marbles?

Back

P(pink) = \frac{4}{10} = \frac{2}{5}.

Front

If you have a standard deck of cards, what is the probability of drawing a heart?

Back

P(heart) = \frac{13}{52} = \frac{1}{4}.