CUET · MATHS · PYQ PAPER 2023
The mean of the number of heads in a simultaneous toss of three coins is :
- A 1
- B \(\frac{1}{2}\)
- C \(\frac{3}{2}\)
- D 2
Answer & Solution
Correct Answer
(C) \(\frac{3}{2}\)
Step-by-step Solution
Detailed explanation
The number of heads in tossing three coins follows a binomial distribution B(n, p). \(n = 3\) (number of trials) \(p = \frac{1}{2}\) (probability of getting a head) Mean \(E[X] = np\) \(E[X] = 3 \times \frac{1}{2}\) \(E[X] = \frac{3}{2}\)
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