Expected Value Practice

Front

Michael, Anika, and Aria are playing a game of chance. They want to calculate the expected value of their game. Which formula should they use?

Back

E(X) = Σ [Xi * P(Xi)]

Front

What is the expected value of the outcome x when James, Evelyn, and Priya roll a dice with different probabilities?

Back

3.05

Front

If Luna draws two balls at random from a bag containing 4 red and 4 blue balls, what is the probability that the second ball she draws is red, given that the first ball she drew was also red?

Back

3/7

Front

What is the probability of drawing a blue ball on the second draw given that a blue ball was drawn on the first draw from a bag containing 3 red and 3 blue balls?

Back

2/5

Front

If Grace, Evelyn, and Hannah approach 55 people, and the probability of someone purchasing a spoon tie is 30%, what is the expected number of spoon ties they will sell?

Back

Approximately 17 spoon ties

Front

What is the expected value of the game played by David, Aiden, and Anika, given the outcomes: David loses and pays $3 (probability 90/360), Aiden wins and gets $10 (probability 90/360), and Anika wins and gets $6 (probability 180/360)?

Back

E. V. = 4.75

Front

What is the expected number of cars for a randomly chosen American household?

Back

1.75

Front

In a certain community, 30% of households have 1 child, 43% have 2 children, and 27% have 3 children. If a household is selected at random, what is the expected number of children in that household?

Back

1.97

Front

Find the expected value. READ CAREFULLY! Options: 4.5, 25.5, 3.825, 6.52

Back

4.5

Front

Find the expected value

Back

Loss of $0.875