Probs & Stats Pre-test

Front

What is the probability of not rolling a 2 on a single die?

Back

The probability of not rolling a 2 is 5/6, since there are 5 outcomes (1, 3, 4, 5, 6) that are not 2 out of 6 possible outcomes.

Front

What is the probability of choosing a letter other than 'A' from the word ALGEBRA?

Back

The probability of choosing a letter other than 'A' is 5/7, as there are 5 letters (L, G, E, B, R) that are not 'A' out of 7 total letters.

Front

Back

Front

If Isidro flips a fair coin 40 times, how many times can he expect heads to appear?

Back

He can expect heads to appear 20 times, as the probability of heads is 1/2, so 40 * 1/2 = 20.

Front

What is the probability of spinning green on a spinner with 4 equal sections, one of which is green?

Back

The probability of spinning green is 1/4, as there is 1 green section out of 4 total sections.

Front

Define 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 a fair coin?

Back

A fair coin is one that has an equal chance of landing on heads or tails, with a probability of 1/2 for each side.

Front

What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms, where the numerator and denominator have no common factors other than 1.

Front

What is the total number of outcomes when rolling a single die?

Back

The total number of outcomes when rolling a single die is 6, corresponding to the six faces of the die.

Front

How do you calculate the expected value in probability?

Back

The expected value is calculated by multiplying each possible outcome by its probability and summing all these products.