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) = (π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘π‘Ÿπ‘–π‘šπ‘’ π‘›π‘’π‘šπ‘π‘’π‘Ÿπ‘  )/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿπ‘ ) = 25/100 = 𝟏/πŸ’ So, the correct answer is (c)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.