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Tiles numbered 1 through 25 are placed in a bag. If one tile is removed at random, what...

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smedisetti | Student, Grade 11 | Honors

Posted January 7, 2012 at 6:02 AM via web

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Tiles numbered 1 through 25 are placed in a bag. If one tile is removed at random, what is the probability that the number on the tile is a prime number?

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bergcar | Student, Grade 11 | Valedictorian

Posted January 7, 2012 at 10:07 AM (Answer #1)

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9 of those 25 numbers are prime so there is a 36% picking a prime number

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted January 7, 2012 at 1:54 PM (Answer #2)

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Tiles numbered 1 through 25 are placed in a bag. The prime numbers among these are 2, 3, 5, 7, 11, 13, 17, 19, 23. The total number of tiles is 25.

The probability of a particular event is the number of favorable ways in which the event can occur divided by the total number of ways in which an event can occur.

Probability of the number on the tile being a prime is `9/25 = (900/25)% = 36%`

The required probability is 36%.

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atyourservice | TA , Grade 10 | Valedictorian

Posted June 30, 2014 at 9:58 AM (Answer #3)

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The prime numbers from 0 to 25 are 2, 3, 5, 7, 11, 13, 17, 19, 23 that means 9 out of the 25 numbers are prime:

9/25  and if you divide 9 by 25 you get .36 

.36 x 100 =36%

so a 36% chance

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