Four balls, numbered 1 to 4, are placed in a bag.
Three balls are removed one at a time.
The three numbers are added. What sum is not possible?
Justify your answer.
a. 9
b. 5
c. 7
d. 6
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Probability is the likelihood or chance of an event occurring.
Probability = the number of ways of achieving success
the total number of possible outcomes
For example, the probability of flipping a coin and it being heads is ½, because there is 1 way of getting a head and the total number of possible outcomes is 2 (a head or tail). We write P(heads) = ½ .
The probability of something which is certain to happen is 1.
The probability of something which is impossible to happen is 0.
The probability of something not happening is 1 minus the probability that it will happen.
Step-by-step explanation:
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