Answer:
Step-by-step explanation:
Given that the bag contains black and red marbles.
Number of black marbles in the bag = 2
Number of red marbles in the bag = 3
Total number of marbles in the bag = Number of black marbles + Number of red marbles = 2 + 3 = 5
Let us have a look at the formula for probability of an event E, which can be observed as:
Now, the marble chosen at first is replaced.
Therefore, the count remains the same.
Now, the <em>required probability</em> can be found as:
Answer:
2,655 students
Step-by-step explanation:
The z-score for a 99% confidence interval is z = 2.576
The standard error for a proportion p is:
For a proportion of p =0.20, in order to ensure a standard error of 0.02, the sample size 'n' must be:
Rounding up to the next whole student, the sample size needed is 2,655 students.
280
The 0 is in the ones.
The 8 is in the tens.
The 2 is in the hundreds.
Answer:
40,550
Step-by-step explanation:
40, 550 is the mod point
Answer: As x —> positive infinity, q(x) —> positive infinity, and as x —> negative infinity, q(x) —> positive infinity
Step-by-step explanation:
Khan Academy! Hope this helps