One is asked to say a two -digit number .
a ) How many two digit numbers are there ?
b) What is the smallest possible sum of the digits ? c ) What is the largest possible sum of the digits ?
d) What is the probability of the sum of the digits being a prime ?
Answers
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Answer:
a, there are 90 2 digits numbers
b, smallest digit is 0
c, largest digit is 100 zeroes
d , 15
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