Probability of Independent and Dependent Events

Q1. Decide whether each set of events is independent or dependent.

A student spins a spinner and chooses a Scrabble tile

• Independent

• Dependent

Q2. Decide whether each set of events is independent or dependent.

A boy chooses a sock from a drawer of socks, then chooses a second sock without replacing the first.

• Independent

• Dependent

Q3. Decide whether each set of events is independent or dependent.

A student picks a raffle ticket from a box, replaces the ticket, then picks a second raffle ticket.

• Independent

• Dependent

Q4. Decide whether each set of events is independent or dependent.

A student spins a spinner and rolls a number cube.

• Independent

• Dependent

Q5. Decide whether each set of events is independent or dependent.

A student picks a raffle ticket from a box and then picks a second raffle ticket without replacing the first raffle ticket.

• Independent

• Dependent

Q6. Decide whether each set of events is independent or dependent.

A student blindly guesses on two multiple choice questions.

• Independent

• Dependent

Q7. Decide whether each set of events is independent or dependent.

A student rolls a 2 on a die and then rolls a 3 on a the same die.

• Independent

• Dependent

Q8. Decide whether each set of events is independent or dependent.

Bob rolls a pair of number cubes twice. On both rolls, the sum is 7.

• Independent

• Dependent

Q9. Decide whether each set of events is independent or dependent.

Nine boys and 12 girls want to play soccer. Teams are formed by selecting one player at a time. Is the probability of selecting a boy after a girl is selected a dependent or an independent event?

• Independent

• Dependent

Q10. Decide whether each set of events is independent or dependent.

A student flips a head on one coin and a tail on a second coin.

• Independent

• Dependent