Question 17 - NCERT Exemplar - MCQ - Chapter 14 Class 10 Probability

Last updated at April 16, 2024 by

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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Transcript

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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