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Let p be a prime number between 40 and 60. What is the probability that p + 12 is also a prime number? Express your answer as a common fraction.

 Sep 9, 2018
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There are : 41 | 43 | 47 | 53 | 59 (5 primes)  Between 40 and 60.

 

41 + 12 =53 is a prime

43 + 12 =55 Not a prime

47 + 12 =59 is a prime

53 + 12 =65 Not a prime

59 + 12 =71 is a prime

Therefore, the probability is: 3/5

 Sep 9, 2018

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