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A hat contains 15 marbles, and each marble is numbered with one and on
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21 May 2017, 13:05
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A hat contains 15 marbles, and each marble is numbered with one and only one of the numbers 1, 2, 3. From a group of 15 people, each person selects exactly 1 marble from the hat. Numbered Marble Number of People Who  Selected The Marble 1   4 2   5 3   6 What is the probability that a person selected at random picked a marble numbered 2 or greater? (A) 5/15 (B) 9/15 (C) 10/15 (D) 11/15 (E) 1
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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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21 May 2017, 13:27
For every three balls numbered 1,2 & 3 ; balls with value 2 and greater than 2 i.e 3 form 2/3 part of total balls which is 3 in this case. So for 15 balls Numbered 1  5 balls Numbered 2  5 balls Numbered 3  5 balls Therefore probability of randomly choosing ball with 2 or 3 will be 2/3 In other words 10 balls / 15 balls Answer C Sent from my Redmi Note 3 using GMAT Club Forum mobile app



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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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21 May 2017, 18:50
Bunuel wrote: A hat contains 15 marbles, and each marble is numbered with one and only one of the numbers 1, 2, 3. From a group of 15 people, each person selects exactly 1 marble from the hat.
Numbered Marble Number of People Who  Selected The Marble 1   4 2   5 3   6
What is the probability that a person selected at random picked a marble numbered 2 or greater?
(A) 5/15 (B) 9/15 (C) 10/15 (D) 11/15 (E) 1 Lets consider the scenario when all the 15 person have picked 1 marble each (with either of number 1,2,3 on it)...selection of favorable case (greater than 1) would be 10/15
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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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21 May 2017, 20:41
Bunuel wrote: A hat contains 15 marbles, and each marble is numbered with one and only one of the numbers 1, 2, 3. From a group of 15 people, each person selects exactly 1 marble from the hat.
Numbered Marble Number of People Who  Selected The Marble 1   4 2   5 3   6
What is the probability that a person selected at random picked a marble numbered 2 or greater?
(A) 5/15 (B) 9/15 (C) 10/15 (D) 11/15 (E) 1 Hi, mynamegoeson and irishiraj87You are reading the question incorrectly.. We are looking for probability of picking a person who has picked number 2 or greater.... It's given 2 is picked by 5 people and 3 by 6 people.. So probability is \(\frac{5+6}{4+5+6}=\frac{11}{15}\).. D
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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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21 May 2017, 22:34
There are a total of (5+6) = 11 people who have a marble number 2 or 3. Rest 4 people have a marble numbered 1. Total people are 15.
So required probability = 11/15
Hence D



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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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23 May 2017, 17:20
Bunuel wrote: A hat contains 15 marbles, and each marble is numbered with one and only one of the numbers 1, 2, 3. From a group of 15 people, each person selects exactly 1 marble from the hat.
Numbered Marble Number of People Who  Selected The Marble 1   4 2   5 3   6
What is the probability that a person selected at random picked a marble numbered 2 or greater?
(A) 5/15 (B) 9/15 (C) 10/15 (D) 11/15 (E) 1 Since 5 people selected a marble numbered 2, the probability of selecting a marble numbered 2 is 5/15. Since 6 people selected a marble numbered 3, the probability of selecting a marble numbered 3 is 6/15. Thus, the probability of selecting a marble numbered 2 or greater is 5/15 + 6/15 = 11/15. Answer: D
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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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24 May 2017, 06:02
There are total 11 (5+6) marbles which are numbered 2 or higher. Probability to select person at random = 1 Total number of marbles to choose from = 15 So the probability that a person selected at random picked a marble numbered 2 or greater = 1 * 11/15 = 11/15
Answer: D



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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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07 Apr 2019, 11:21
People <2 ; 4/15 so <2 ; 14/15 ; 11/15 IMO D Bunuel wrote: A hat contains 15 marbles, and each marble is numbered with one and only one of the numbers 1, 2, 3. From a group of 15 people, each person selects exactly 1 marble from the hat.
Numbered Marble Number of People Who  Selected The Marble 1   4 2   5 3   6
What is the probability that a person selected at random picked a marble numbered 2 or greater?
(A) 5/15 (B) 9/15 (C) 10/15 (D) 11/15 (E) 1
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Re: A hat contains 15 marbles, and each marble is numbered with one and on
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