Luis draws 1 card from a deck, 39 times. Predict how many times he draws an ace.

Question

John and O'Neal are playing a board game in which they roll two number cubes. John needs to get a sum of 8 on the number cubes to win. O'Neal needs a sum of 11, if they take turns rolling the number cube, who is more likely to win? Explain.

Horace is going to roll a standard number cube and flip a coin. He wonders if it is more likely that he rolls a 5 and the coin lands on heads, or that he rolls a 5 or the coin lands on heads. Which event do you think is more likely to happen? Find the probability of both events to justify or reject your initial prediction.

Pierre asks Sherry a question involving the theoretical probability of a compound event in which you flip a coin and draw a marble from a bag of marbles. The bag of marbles coins 3 white marbles, 8 green marbles, and 9 black marbles. Sherry's answer, which is correct, is 12/40. What was Pierre's question?

Answer 1

Assuming the card is returned after each draw,
number = (4/52)(39)
= 3

To get an 8:
2,6
3,5
4,4
5,3
6,2

prob of getting an 8 = 5/36

to get 11:
5,6
6,5
prob of 11 = 2/36

compare

Second-last one makes no sense

What is the prob of getting a head on the coin and either a white or green marble ?

prob = (1/2)(12/20)
= 3/10, which is what the given answer should have been reduced to

Answer 2

you stupid
if you dont kow this