Statistics & Probability - ACT Math

A bag has $5$ red and $3$ blue marbles. If a red marble is drawn and not replaced, what is the probability the next marble is also red?

Find the median of: $3, 7, 9, 12$

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

What is the multiplication principle (counting principle)?

A spinner has $8$ equal sections numbered $1$ to $8$. What is the probability of landing on an even number?

What does it mean for two events to be independent?

Find the mean of: $3, 5, 7, 9, 11$

What is the mode of: $1, 2, 3, 4, 5$?

In how many ways can $5$ books be arranged on a shelf?

A class has test scores: $70, 75, 80, 85, 90$. What is the median?

What is a permutation?

Find the range of: $5, 12, 3, 18, 7$

What is expected value?

How many different $4$-letter "words" can be formed from the letters in MATH if no letter is repeated?

A card is drawn from a standard deck. What is the probability of NOT drawing a heart?

Data set: $5, 10, 15, 20, 25$. If each value is multiplied by $2$, what happens to the mean?

What is conditional probability $P(A|B)$?

A jar contains $4$ red, $6$ green, and $10$ yellow marbles. What is the probability of selecting a green marble?

What is the mean (average) of a data set?