Question 938914: Numbers 1 thru 10 are written on individual cards and placed in a bag. If you reach in the bag what is the probability that it will be a 4 or 5
Answer by mathmate(429)   (Show Source):
You can put this solution on YOUR website!
We are assuming:
1. cards are identical, and have equal probability of picking each of the 10.
2. picking of the card is completely random.
Under these circumstances,
probability = 
set of successful picks = {4,5} ... there are two elements
set of possible picks = {1,2,3,4,5,6,7,8,9,10} ... there are 10 elements
Probability of pick a 4 or a 5 =  = 
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