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Tickets numbered from 1 to 20 are mixed ...

Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the ticket has a number which is a multiple of 3 or 7?

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Verified by Experts

Numbered tickets from `1` to `20`
By using the formula
`P(E)`=favourable outcomes/total possible outcomes
To find the probability of the ticket drawn having a number which is a multiple of `3` or `7`
...
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