Ok, I do not know if I am doing this right or not. I am coming up with a different number then what one of the answers are. Can anyone help please?

Suppose you are going to draw 2 jellyfish, without replacement, from a tank that contains 5 mushroom jellyfish and 3 cannonball jellyfish. Find the probability that at lease 1 cannonball jellyfish will be selected.

I thought you woud do it this way, but I am not sure?

Total of jellyfish: 8

mushroom would stay at 5/8. ( think)

Cannonball would be subtracted by 1 -----2/8+1/8=3/8

5/8*3/8=15/64= 15/64 -----but this answer is not any the teacher gives.

The key here is that it says find the probability that at least 1 cannonball jellyfish will be selected. Notice the 'at least'. So you have to find the probability of selecting 1 or 2 cannonball jellyfish.

3)a Small City Has Eight Police Districts. There Have Been A Number Of Break And Enters Lately.
Four District Had Three Break And Enters Every Night For Three Nights. Two Districts Had Two Break And Enters In Each Night For Four Night
The Other Two Districts Had Only One Break And Enter Over A Four Day Period
@... what Was The Total Number Of Break And Enters?
B)... What Wat The Average Number Of Break And Enters Per District.

4)two Police Officers Must Check The Store Fronts Of A Three Block Area To Ensure That All Doors Are
Secured And Locked.each Door Takes An Average Of One And Half Minutes To Approach And Check.
There Are 60 Doors At Check
@... how Long Will It Take The Two Officer To Finish The Job.

5)it Is Very Important That Police Officers Keep Physically Fit.
If Sixteen Police Officer Do A Total Of 1600 Push Ups A Day For Three Days;
@... what Is The Total Number Of Push Up's Completed.
B)... if 50% Of The Officer Do 75% Of The Total Number Of Push Up's, What Is The Total Number Of Push Up's
That Each One Of These Officers Completes.

6)the Number Of Motor Vehicle Accidents Reported To The Police Service Over Five Years Period Were;
Year1... 24,726,yr2... 25,050,yr3... 21,677,yr4... 22,541,yr5... 23,611.
@... what Were The Average Number Of Motor Vehicle Accident Per Year Over The Five Years Period?

7)constable Jones Shoots Six Clips Of 10 Bullet In One And Half Minute And Hits The Bulls-eye 75% Of The Time.
@... how Many Tome Did He Hit The Bulls Eye?
B)how Many Shots Per Clip?