जॉइन Examsbookउत्तर : 3. "1/221"
If two cards are taken one after another without replacing from a pack of 52 cards. What is the probability for the two cards be Ace ?5
प्र: If two cards are taken one after another without replacing from a pack of 52 cards. What is the probability for the two cards be Ace ?
- 151/1221false
- 242/221false
- 31/221true
- 452/1245false
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उत्तर : 3. "1/221"
व्याख्या :
Answer: C) 1/221 Explanation: Total Combination of getting a card from 52 cards = C152 Because there is no replacement, so number of cards after getting first card= 51 Now, Combination of getting an another card= C151 Total combination of getting 2 cards from 52 cards without replacement= (C152×C151) There are total 4 Ace in stack. Combination of getting 1 Ace is = C14 Because there is no replacement, So number of cards after getting first Ace = 3 Combination of getting an another Ace = C13 Total Combination of getting 2 Ace without replacement=C14×C13 Now,Probability of getting 2 cards which are Ace =C14×C13C152×C151 = 1/221.