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There are 10 cards. They are numbered: 9,10,11,12,13,14,15,16,17,18. One card is randomly picked. What is P(prime number)? 20%,30%,50%,70%
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There are 10 cards. They are numbered: 9,10,11,12,13,14,15,16,17,18. One card is randomly picked. What is P(prime number)? 20%,30%,50%,70%

User Ken Goodridge
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So there are 10 numbers, and 3 of them are prime. Our prime numbers are 11, 13, and 17.

3/10 would be our fraction for this equation, and 3/10 is equal to 30%.

30% is your answer!
User Maurycyt
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