Probability

Front

What is Probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

Front

If a bag contains 5 red balls and 3 yellow balls, what is the probability of picking a red ball?

Back

Probability = 5/(5+3) = 5/8.

Front

What does it mean if the probability of an event is 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if the probability of an event is 1?

Back

It means the event is certain and will definitely occur.

Front

How do you express probability as a fraction?

Back

Probability can be expressed as a fraction of the number of successful outcomes over the total number of outcomes.

Front

What is the probability of selecting a purple marble from a bag with 8 red and 6 purple marbles?

Back

Probability = 6/(8+6) = 6/14 = 3/7.

Front

What is the probability of selecting a brown M&M from a bowl with 4 yellow, 6 orange, 3 green, 5 blue, and 2 brown M&Ms?

Back

Probability = 2/(4+6+3+5+2) = 2/20 = 1/10.

Front

If a jar contains 2 pink, 6 red, and 4 blue marbles, what is the probability of picking a red or blue marble?

Back

Probability = (6+4)/(2+6+4) = 10/12 = 5/6.

Front

What is the probability of pulling a red marble from a jar with 10 green, 7 red, and 3 blue marbles?

Back

Probability = 7/(10+7+3) = 7/20.