B. 15 + 26 ( use order of operations )
AND
D. 20 + 21 ( use the associative property )
Answer:
a) 0.65
b) 0.1581
Step-by-step explanation:
We are given the following in the question:
Distribution of X:
Mean = 0.125
Standard deviation = 0.05
Distribution of Y:
Mean = 0.350
Standard deviation = 0.10
Solution:
a) mean of M
b) standard deviation of M
If X and Y are independent then,
Standard deviation of M =
Ok, this is usually a trial and error question and it is supposed to be fun.
I believe you want the four women to cross the bridge in the least possible time before the bridge collapses.
The solution is as follows:
<span>1- The 5-minute lady and 10-minute lady cross the bridge
(the total time will be 10 minutes)
</span>2- <span>The 5-minute lady returns
(the total time will be 5 + 10 = 15 minutes)
3- </span><span>The 20-minute lady and 25-minute lady cross
(the total time will be 15 + 25 = 40 minutes)
4- </span><span>The 10-minute lady returns
(the total time will be 10 + 40 = 50 minutes)
5- </span><span>The 5-minute lady and 10-minute lady finally cross
(the total time will be 10 + 50 = 60 minutes)
The last one to cross should step aside from the bridge as quickly as possible before the bridge collapses.</span>
