AMC 8 Daily Practice Round 5

Complete problem set with solutions and individual problem pages

Problem 3 Easy

There are some odd numbers: 1, 3, 5, 7, \cdots and 39. If you choose one randomly, the probability that you get a prime number is            .

  • A.

    \frac{1}{10}

  • B.

    \frac{3}{5}

  • C.

    \frac{13}{20}

  • D.

    \frac{11}{20}

  • E.

    \frac{7}{20}

Answer:D

There are 11 odd prime numbers among 1 to 39 which are 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, and 37. Thus, the probability is \frac {11}{20}.

Related Problems
Problem 1 AMC 8 Daily Practice Round 5
Problem 2 AMC 8 Daily Practice Round 5
Problem 4 AMC 8 Daily Practice Round 5
Problem 5 AMC 8 Daily Practice Round 5
Think Academy Powered by ChatGPT