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What is the probability of rolling a prime number of a standard 20-sided die? (1 is not a prime number.) a. 7/20 b. 2/5 C. 9/20 d. 1/2 ​

User Mithrandir
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1 Answer

7 votes

Answer:

b , 2/5

Explanation:

Prime no. is no. that has only 2 factor so b/n 1 and 20 the prime no. are 2, 3, 5, 7, 11, 13, 17, 19 so they are 8 in no.

The probablity will be 8/20 = 2/5 so the answer is b

User Don Djoe
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