User talk:Burnschris185

File:Probability line

Probability in numbers

• 

In the real world events cannot be pradicted with total certainty. The best we can do is to say how likely they are to happen.

'Examle 1:

an experement with a coin:'

• Toss a coin 100 times, how many heads will come up?
  
• Probability says that heads have a 1/2 chance, so we would expect 50 heads.
  
• But when you actually try it out you might get 48 heads, or 55 heads...or anything realy, but in most cases it will be a number near 50.
  

Example 2: 5 marbels in a bag:

• 4 are blue and 1 is red.
• Probability that blue marble will be picked?
• number of ways it can happen: 4(there are 4 blues)
• Total number of outcomes:5(there sre 5 marbels

So the probability = 4/5 =0.5