Probability Normal Distribution

[reggiwilliams]

Revising probability and came across this exam question with no solution
I attach question and my attempt at the answer
Hopefully I have got it mostly correct but would appreciate your thoughts

 

[blamocur]

Look close enough. I get 107.8, but the difference is caused by your more aggressive rounding of intermediate results.

 

[blamocur]

Look close enough. I get 107.8, but the difference is caused by your more aggressive rounding of intermediate results.

Actually, you do have a small error in your arithmetic. Without that error your rounding would get 107.7 instead of 107.8.

 

[reggiwilliams]

Want to get right answer Could you explain how you got to 106.8?

 

[reggiwilliams]

Actually, you do have a small error in your arithmetic. Without that error your rounding would get 107.7 instead of 107.8.

Where is error?

 

[blamocur]

Where is error?

You have only a few operations in there -- can't you check them?

 

[reggiwilliams]

Sorted thank you