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?

4 Answers | Add Yours

justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

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%.

atyourservice's profile pic

atyourservice | Student, Grade 11 | (Level 3) Valedictorian

Posted on

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

bergcar's profile pic

bergcar | Student, Grade 11 | (Level 1) Valedictorian

Posted on

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

We’ve answered 315,625 questions. We can answer yours, too.

Ask a question