Question 80Asked in BPSC TRE 2.0 (2023) Mathematics Class 9-10

The probability of getting at least a head by throwing three unbiased coins isतीन निष्पक्ष सिक्के फेंकने से कम-से-कम एक हेड आने की प्रायिकता है

तीन निष्पक्ष सिक्के फेंकने से कम-से-कम एक हेड आने की प्रायिकता है
  1. A1/81/8
  2. B7/87/8
  3. C3/83/8
  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: (B) 7/87/8

Explanation

P(at least one head) = 1 - P(no head) = 1 - 1/8 = 7/8.P(कम-से-कम एक हेड) = 1 − P(कोई हेड नहीं) = 1 − 1/8 = 7/8।

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

This is question 80 of BPSC TRE 2.0 (2023) Mathematics Class 9-10 — 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.