What is the probability of exactly two heads when three coins are tossed?
तीन coins उछालने पर exactly two heads की probability क्या है?
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Correct Answer
B. 3/8 / 3/8
ExplanationStep 1: Three coins have total outcomes 2³ = 8. Step 2: Exactly two heads have 3 outcomes so probability is 3/8. Step 3: For exactly r heads remember nCr.
Step 1: तीन coins के total outcomes 2³ = 8 हैं। Step 2: exactly two heads के 3 outcomes हैं इसलिए probability 3/8। Step 3: exactly r heads के लिए nCr याद रखें।