If you flip a fair coin 4 times, what is the probability that you will get exactly 2 tails?

Mathematics

2 answers:

Musya8 [376]2 years ago

7 0

Answer:

0.375, or 0.38 rounded.

Step-by-step explanation:

https://socratic.org/questions/if-you-flip-a-fair-coin-4-times-what-is-the-probability-that-you-will-get-exactl

Link to the answer.

andreyandreev [35.5K]2 years ago

3 0

Answer:

50/50

Step-by-step explanation:

2 is half of 4. 4/2 is 50/50

You might be interested in

You owe 958.62 on a credit card at 9.7 percent apr the minimum payment is 105.00 how much goes toward principal if you make the

weqwewe [10]

APR stands for Annual Percentage Rate and in this problem, we are given APR is equal to 9.7%
Per month rate = 9.7% / 12 months = 0.808%

Total credit interest for 12 months = 958.62 *0.097 = $92.97
In one month = $92.97/12 = $7.7475
If you pay at the end of the first month:
Payment = 105.00
The amount goes to principal:
Amount =$105 - $ 7.7475
Amount = $142.25

7 0

2 years ago

a metalsmith is mixing two molten metals, each containing different percentages of silver. the table shows the amount of each mo

Likurg_2 [28]

It would be much easier if you attached a table. Anyway I know what you need to do. Just make an equation and put the numbers from the table given you in the task. And you'll solve it.

7 0

3 years ago

Read 2 more answers

A swim team must be chosen from 12 candidates. What is the greatest number of different 3-person teams that can be chosen?

grin007 [14]

<h3>Answer: 220 combinations</h3>

==========================================

Explanation:

We have 12*11*10 = 1320 permutations possible. This is where order matters. However, order does not matter with swim teams as there are no positions or ranks. All that matters is the group overall (rather than any individual in the group).

Consider the set {A,B,C}. We have 3*2*1 = 6 ways to arrange this set of letters. When considering a permutation, there are 6 permutations but only 1 combination since order doesnt matter and ABC is the same as BAC. Therefore, we divide 1320 over 6 to get the final answer of 1320/6 = 220.

---------

You can use the combination formula with n = 12 and r = 3. Doing so will give the following:

$_n C _r = \frac{n!}{r!*(n-r)!}\\\\_{12} C _3 = \frac{12!}{3!*(12-3)!}\\\\_{12} C _3 = \frac{12!}{3!*9!}\\\\_{12} C _3 = \frac{12*11*10*9!}{3!*9!}\\\\_{12} C _3 = \frac{12*11*10}{3!}\\\\_{12} C _3 = \frac{12*11*10}{3*2*1}\\\\_{12} C _3 = \frac{1320}{6}\\\\_{12} C _3 = 220\\\\$