HW Flashcard: Randomness and General Addition Rule in Probability

Front

Probability is ...

Back

the chance that some event will occur.

Front

If you spin a spinner 1000 times, how many times would you expect it to land in sector 4?

Back

250

Front

Probability can be written as ...

Back

a fraction, a decimal, a percent, all of the above.

Front

What is the probability of choosing a student fluent in French or Spanish from 125 students, where 30 are fluent in French, 45 in Spanish, and 18 in both?

Back

57/125

Front

What is the probability of drawing a red card from a standard deck of cards on the second draw?

Back

26/52, or 1/2.

Front

Define the General Addition Rule in Probability.

Back

P(A or B) = P(A) + P(B) - P(A and B)

Front

What is the probability of an event that is certain to happen?

Back

1 (or 100%)

Front

What is the probability of an impossible event?

Back

0 (or 0%)

Front

In a standard deck of cards, how many total cards are there?

Back

52 cards.

Front

What is the probability of drawing an Ace from a standard deck of cards?

Back

4/52 or 1/13.