Question 48Asked in CTET December 2024 Paper 2 Maths & Science, 14 Dec 2024

Cards bearing numbers 12, 13, 14, ... , 70, 71 (one number on one card) are kept in a box and then a card is drawn from the box without looking into it.…संख्याएँ 12, 13, 14, ... , 70, 71 कार्डों पर लिख कर एक डिब्बे में रख दी जाती हैं (एक कार्ड पर एक संख्या) तथा फिर इस डिब्बे में से बिना अंदर देखे, एक कार्ड…

Cards bearing numbers 12, 13, 14, ... , 70, 71 (one number on one card) are kept in a box and then a card is drawn from the box without looking into it. What is the probability that the card drawn has the number which is not a prime ?
संख्याएँ 12, 13, 14, ... , 70, 71 कार्डों पर लिख कर एक डिब्बे में रख दी जाती हैं (एक कार्ड पर एक संख्या) तथा फिर इस डिब्बे में से बिना अंदर देखे, एक कार्ड निकाला जाता है। इसकी क्या प्रायिकता है कि निकाले गए कार्ड पर एक ऐसी संख्या है, जो अभाज्य नहीं है?
  1. A45/5945/59
  2. B1/41/4
  3. C15/5915/59
  4. D3/43/4
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Correct answer: (D) 3/43/4

Explanation

There are 60 cards. Primes from 12 to 71: 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71 = 15. Non-primes = 45, so probability = 45/60 = 3/4.कुल 60 कार्ड हैं। 12 से 71 तक अभाज्य संख्याएँ: 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71 = 15। अभाज्य नहीं = 45, इसलिए प्रायिकता = 45/60 = 3/4।

From CTET December 2024 Paper 2 Maths & Science, 14 Dec 2024 — Previous Year Paper

This is question 48 of CTET December 2024 Paper 2 Maths & Science, 14 Dec 2024 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.