Answer:
She originally had 7 necklaces.
Step-by-step explanation:
She now has 18 necklaces. She bought four more. That would be 18 - 4 = 14. She gave half of them to her sisters. 14 divided 2 is 7.
Answer:
y = -0.2x + 1.4
Step-by-step explanation:
I graphed the points on the graph below. Then I found the slope of the line.
If this answer is correct, please make me Brainliest!
Answer:
The slope is -3
Step-by-step explanation:
The equation is in y=mx+b form where m is always the slope. In this case, m=-3, therefore that is the slope
Answer:
25%
Step-by-step explanation:
I'm not great at probability but the chances of rolling an odd number on one dice is 50%, so you should have to multiply 0.5 * 0.5 to get 0.25, or a percentage of 25%. Hope this helps :)
Answer:
a) It is a binomial experiment
b) It is not a binomial experiment, since we do not have a value of n.
Step-by-step explanation:
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
So:
a) A poll of 1200 registered voters is conducted in which the respondents are asked whether they believe Congress should reform Social Security.
For each voter, there are only two outcomes. Either they believe the Congress should reform Social Security, or they do not believe.
There are 1200 voters, so
.
Each voter has a probability of voting yes and a probability of voting no. So yes, it is a binomial experiment.
b) A baseball player who reaches base safely 30% of the time is allowed to bat until he reaches base safely for the third time. The number of at-bats required is recorded.
Here, there is no fixed number of at bats, so there is no value of n. So this is not a binomal experiment.