
bySayantani Barman Experta en el extranjero
Question: What is the probability of getting a jack from a 52-card deck on both the first and second draw if the cards are not replaced?
- 1/13
- 1/17
- 30/221
- 7/221
- 1/221
“What is the probability of getting a jack from a 52-card deck on both the first and second draw if the cards are not replaced?” - is the topic of GMAT Quantitative reasoning section of GMAT. This question has been taken from the book “GMAT Prep Plus 2021”. GMAT Quant section consists of a total of 31 questions. GMAT Data Sufficiency questions consist of a problem statement followed by two factual statements.GMAT data sufficiency comprise 15 questions which are two-fifths of the total 31 GMAT quant questions.
Answer:
As there are 4 jacks in a pack of 52-card deck
So, Probability = Number of favorable outcomes/Total outcomes
Firstly, we will find the probability of getting a jack in first draw
Formula to calculate this is:
Probability = Number of favorable outcomes in first draw/Total outcomes
Probability = 4C1 / 52C1
Now, we will check the probability of getting a jack on second draw.
Formula to calculate this is:
Probability = Number of favorable outcomes in second draw/Total outcomes
Number of favorable outcomes = 3C1 (As we already drew one card)
Hence, Required Probability = 3C1 / 51C1
Now, multiply both the probabilities, we will get:
So, 4*3 /52*51 = 1/221
Correct option: E
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