7th Grade: 5.2 Experimental Probability of Simple Events

Front

What is experimental probability?

Back

Experimental probability is the ratio of the number of times an event occurs to the total number of trials or experiments conducted.

Front

How do you calculate the probability of a simple event?

Back

Probability of a simple event = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

What is the probability of rolling a number less than 3 on a die?

Back

1/3

Front

If Cindy has 7 t-shirts and 2 are gray, what is the probability of selecting a gray t-shirt?

Back

2/7

Front

What is the probability of flipping tails on a fair coin?

Back

50% or 1/2

Front

What is the probability of flipping heads on a fair coin?

Back

50% or 1/2

Front

In Perry's Bagel Shop, what is the probability of selecting an onion bagel if there are 10 onion bagels and 75 total bagels?

Back

2/15

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain and will definitely occur.

Front

If an event has a probability of 1/4, what does this indicate about its likelihood?

Back

It indicates that the event is less likely to occur than not, with a 25% chance.