By what I can tell, that is telling you what the measurement of rain was per month. For example, August had 10. That means that in the month of August there was 10 inches of rain.
It is called a complex number.
I hope it's not to late but the answer would be 81
There are 10 digits from 0 to 9, inclusive.
Thus, number of ways in which four numbers will be drawn from an urn containing balls numbered 0-9, inclusive is given by

The number of ways in which a ticket holder will have the first two digits in the correct order is the same as the number of ways in which two numbers will be drawn from the urn containing balls numbered 0-9, inclusive and is given by

Therefore, <span>the probability that a ticket holder has the first two digits in exact order is given by

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