Question 150Asked in BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam)

A and B are two independent events with equal probabilities such that P(A ∪ B) = 0·75, thenA और B समान संभावनाओं वाली दो स्वतंत्र घटनाएँ हैं जैसे कि P(A ∪ B) = 0·75, तो

A और B समान संभावनाओं वाली दो स्वतंत्र घटनाएँ हैं जैसे कि P(A ∪ B) = 0·75, तो
  1. AP(B) = 0·25P(B) = 0·25
  2. BP(A) = 0·75P(A) = 0·75
  3. CP(B) = 0·5P(B) = 0·5
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (C) P(B) = 0·5P(B) = 0·5

Explanation

Let P(A) = P(B) = p. Independence gives P(A ∪ B) = 1 − (1 − p)² = 0.75, so (1 − p)² = 0.25 and p = 0.5.मान लें P(A) = P(B) = p। स्वतंत्रता से P(A ∪ B) = 1 − (1 − p)² = 0.75, अतः (1 − p)² = 0.25 और p = 0.5।

From BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — Previous Year Paper

This is question 150 of BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — 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.