Two dice rolled, one at a time. Find the probability of rolling a 5 on the firts die and a 2 on the second. Ro

Question

Refer to the question above. Find the probabilty of rolling both numbers less than 4. Round to the nearest whole percent?

Answer both get 10 points

Answer 1

P(5) + P(2) = 1/6 * 1/6
P(5) + P(2) = 1/ 36

P(>4) + P(>4) = 3/6 * 3/6
P(>4) + P(>4) = ½ * ½
P(>4) + P(>4) = ¼
P(>4) + P(>4) = 25%

Answer 2

The question can be looked at as two separate events. For example, the first problem can be looked as one dice rolling a 5 and a separate dice 12 miles away at a friends house rolling a two. Order does not matter. The probability of rolling a 5 on a six-sided die is 1/6. The probability of rolling a 2 is also 1/6. It doesn't matter if you use one die and roll it twice, or 2 die rolled once. The probability of these events are both 1/6 each. To find the probability of both these events occurring, multiply the probabilities:

1/6 * 1/6 =1/36.

The second problem can be looked at in the same way. You have 2 rolls. The first roll you roll a # less than 4, or deductively, 1, 2, or a 3. The probability of rolling a 1,2,or3 is 1/2 on a 6-sided die. The probability of doing it twice is 1/2*1/2 = 1/4. So the probability is 1/4 of rolling both die a # less than 4.

Answer 3

a)Probablility of rolling a 5 on one role =1/6
Probabbility of rolling a 2 on a role =1/6
The probability of rolling a 5 on the first die AND a 2 on the second die = 1/6x1/6=1/36

b)The probablity of rolling a die to get a no. lesser than 4,ie 1,2,3 is 3/6 or 1/2
The probablity of rolling 2 sepearte dies where both the nos are less than 4 =1/2x1/2=1/4
1/4x100 =25%

Answer 4

P(A) = P(5 on first throw) = 1 / 6
P(B) = P(2 on 2nd throw) = 1 / 6
P(A and B) = 1 / 36

P(both less than 4) = 1 /2 x 1 / 2 = 1 / 4

Answer 5

1) 1/6 * 1/6 = 1/36
2) .5 * .5 = .25 (round up, down or nearest even?)

Answer 6

5/6 * 2/6= 10/36 or 5/18
4/6*3/6*2/6*1/6= 2/48 or 1/24
i don't know if that is correct ^^

Answer 7

is this your homework, and you are too lazy to calculate it out yourself??

Answer 1) 3%

Answer 2) 25%