दो सिक्के एक साथ उछाले जा रहे हैं। दो पश्च भाग प्राप्त करने की प्रायिकता है Two coins are tossed simultaneously. The probability of getting exactly two tails is

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दो सिक्के एक साथ उछाले जा रहे हैं। दो पश्च भाग प्राप्त करने की प्रायिकता है Two coins are tossed simultaneously. The probability of getting exactly two tails is