Probability of events

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What does it mean for outcomes to be equally likely?

Back

Equally likely outcomes are outcomes that have the same chance of occurring.

Front

How many equally likely outcomes are there when rolling a standard 6-faced die?

Back

There are 6 equally likely outcomes when rolling a standard 6-faced die.

Front

If you roll a die, what is the probability of rolling an even number?

Back

The probability of rolling an even number (2, 4, or 6) is 3 out of 6, or 1/2.

Front

What is the expected number of times to roll a 2 in 60 rolls of a die?

Back

You would expect to roll a 2 about 10 times.

Front

If a coin is tossed, what is the probability of getting heads?

Back

The probability of getting heads when tossing a coin is 1/2.

Front

What is the probability of getting tails on the next toss after getting heads 20 times in a row?

Back

The probability remains 1/2, as each toss is independent.

Front

How do you calculate the expected number of occurrences of an event?

Back

Multiply the total number of trials by the probability of the event.

Front

What is the total number of outcomes when spinning a spinner with 6 equal sections?

Back

There are 6 equally likely outcomes on the spinner.

Front

What is the probability of rolling a number greater than 4 on a 6-faced die?

Back

The probability is 2 out of 6, or 1/3 (rolling a 5 or 6).