# Probability 68594

What is the probability that any two-digit number

a) is divisible by five

b) is it not divisible by five?

a) is divisible by five

b) is it not divisible by five?

### Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**combinatorics**- variations
- permutations
**algebra**- divisibility
**arithmetic**- rounding
**numbers**- fractions
- natural numbers

#### Themes, topics:

#### Grade of the word problem:

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