Answer: 71
Step-by-step explanation:
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 

A) P( Jordan finishes before Jacobs)= 2/5 = 0.40
P( Jacobs finishes before Julia) = 3/5 = 0.60
P(Jordan finishes before Jacobs AND before Julia) = 0.40 x 0.60 = 0.24
b)P( Jordan finishes before Jacobs)= 2/5 = 0.40 (already calculated
0.5•175=87.5 This is you answer, do you understand?