A single die is rolled.

Question

(a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.)


(b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.)


(c) What is the probability that the number on top is a number less than 5. (Give your answer correct to two decimal places.)


(d) What is the probability that the number on top is a number no greater than 3. (Give your answer correct to two decimal places.)

Answer 1

a. 1/6 +1/6 = 2/6 or 1/3 = .33
b. 3/6 + 1/6 = 4/6 or 2/3 = .67
c. 4/6 + 2/6 = 6/6 or 1.00
d. 1/6 + 1/6 = 2/6 or 1/3 = .33
Please tell me how I am missing these, and give me right formula, I do not want you to work them out, I need to learn this stuff, just help on formula if I am using the wrong one.

Answer 2

a. probability=numberwaysright/total number ways=1/6

b. there are the following odd numbers: 1,3,5. There are six possible numbers
probability=3/6=1/2

c. Less than five means not 5, or 6
probability=1-2/6

d. no greater than three means 1,2, or 3
probability=3ways/6possible=1/2

Answer 3

2/3
4/5