if a die is rolled,what is the probability of rolling a number less than4 or an even number?
Remember that probability is expressed as a number between 0 and 1, not a percentage. And certainly not a horribly rounded-off decimal like "0.3" for 2/6.
Probability is the number of favorable events, over the total number of possible events. [ On a standard die, there are only 6 events that you can get on a roll: roll a 1, roll a 2, roll a 3, roll a 4, roll a 5, or roll a 6.
The probability of rolling "a 6 or a number greater than 4" is the same as rolling either a 5 or a 6. There are only 2 ways to do this, so the probability is 2/6, which reduces to 1/3.
The probability of rolling "a
5 or an odd number" is the same as rolling a 1, 3, or 5. So that's 3/6, which reduces to 1/2.
You should be able to do the last one now. ]
