Does and mean add or subtract?
Does and mean add or subtract?
We have collected some basic definitions on this page….The Basic Operations.
| Symbol | Words Used |
|---|---|
| + | Addition, Add, Sum, Plus, Increase, Total |
| − | Subtraction, Subtract, Minus, Less, Difference, Decrease, Take Away, Deduct |
What does and stand for in probability?
In probability, there’s a very important distinction between the words and and or. And means that the outcome has to satisfy both conditions at the same time. Or means that the outcome has to satisfy one condition, or the other condition, or both at the same time.
What is the probability of two independent events?
Probability of Two Events Occurring Together: Independent Just multiply the probability of the first event by the second. For example, if the probability of event A is 2/9 and the probability of event B is 3/9 then the probability of both events happening at the same time is (2/9)*(3/9) = 6/81 = 2/27.
What is the probability that at least one of them is a boy?
At least one of them is a boy. Assuming the probability of having a boy or girl is 50%, what is the probability that both children are boys? If you answered 1/2, you’re not without comrades, but the generally accepted answer by statisticians (though not without debate) is 1/3.
What is the probability of having 5 daughters in a row?
As many answers already conclude a statistical event has no memory of earlier events, like flipping a coin where the coin has no memory of being flipped before. So there s a distinction, assuming chance is 50% getting a boy each “flip” between getting five girls in a row (1/32) and having a girl the fifth time (1/2).
What are the chances of having a third girl?
Parents are 6% more likely to stop having children if the first two children are a boy and a girl….Did previous children’s gender influence whether to have a third child?
| Previous Children | Parents Having 3rd Child |
|---|---|
| Boy/Boy | 46% |
| Boy/Girl | 39% |
| Girl/Girl | 43% |
What are the odds of having 6 daughters?
When you see a family of say, six boys or six girls, it certainly seems like some kind of statistical fluke! But take a look at the chart above: there’s a 3% chance of having all boys or all girls with 6 children.
What are the chances of having a fourth girl?
Each child has a probability of being a girl is 1/2. If there are 4 children in the family, the probability of all the four being girls is (1/2)^4=1/16.