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Someone is asked to take a number from 1 to 100. The probability that it is a prime is

(A) 1/5  (B) 6/25     

(C) 1/4   (D) 13/50  

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Question 17 Someone is asked to take a number from 1 to 100. The probability that it is a prime is (A) 1/5 (B) 6/25 (C) 1/4 (D) 13/50 Total numbers = 100 Prime numbers are… 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97… Number of prime numbers less than 100 = 25 Thus, P(getting a prime number) = (𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑝𝑟𝑖𝑚𝑒 𝑛𝑢𝑚𝑏𝑒𝑟𝑠 )/(𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟𝑠) = 25/100 = 𝟏/𝟒 So, the correct answer is (c)

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.