Answer:
its d
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
Please find the solution in the image attached below.
Hope this helps!
1/4 * 1/3 * 1/2 * 1/1 = 1/24 chance that all 4 letters are placed in the correct envelopes.
With the first envelope, there are 4 choices of letters, so the probability of picking the correct letter is 1/4.
With the second envelope, there are 3 remaining letters, so the probability of picking the correct letter is 1/3.
The same logic follows the the third and final letter.
28.3 if u add the 25 and the 3 it would be I I believe this is right .
Answer:
1. 24
2.
where n denotes number of days.
3. 70
Step-by-step explanation:
1.
Consider the sequence: 
Here,

Take the common difference as d = 2 and the first term as a = 12
Use the formula: 
To find expected gain at the end of the week, find 

2.
Yes, the gain shows the pattern.
Put
in 

Here, n denotes number of days.
3.
To find expected gain at the end of 30 days, put
in 
