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12 May 2025, 00:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
76% (00:49) correct
24%
(01:10)
wrong
based on 51
sessions
History
Date
Time
Result
Not Attempted Yet
What is the number of members of the Booster Club who are under 21 years old?
(1) Exactly 2/3 of the members of the Booster Club are at least 21 years old.
(2) The 15 males in the Booster Club account for 50 percent of the club's membership.
Source: Grockit
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
(1) Exactly 2/3 of the members of the Booster Club are at least 21 years old.
(2) The 15 males in the Booster Club account for 50 percent of the club's membership.
Source: Grockit
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
12 May 2025, 01:01
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number of members of the Booster Club who are under 21 years old?
Let all members be t
S1
Members who are at least 21 years old (>=21) = 2t/3
Members who are under 21 years old (<21) = t/3
We don't know t
Insufficient
S2
15 = .5 t
t = 30
We don't know how many members are under 21 years old (<21)
Insufficient
Combined, t = 30 and Members who are under 21 years old (<21) = t/3. Sufficient
Answer C
Let all members be t
S1
Members who are at least 21 years old (>=21) = 2t/3
Members who are under 21 years old (<21) = t/3
We don't know t
Insufficient
S2
15 = .5 t
t = 30
We don't know how many members are under 21 years old (<21)
Insufficient
Combined, t = 30 and Members who are under 21 years old (<21) = t/3. Sufficient
Answer C
Bunuel
12 May 2025, 03:13
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We are required to answer --> What is the number of members of the Booster Club who are under 21 years old?
(C)ombined we get the answer. Option (C) is the right answer.
| Statement | Explanation |
|---|---|
| Statement 1 | Exactly 2/3 of the members of the Booster Club are at least 21 years old. We need the exact numbers, not a fraction; we don't have information about the size of the Booster Club. |
| Statement 2 | 15 males in the Booster Club account for 50 percent of the club's membership. This gives us information about the size of the Booster Club, but not any information about the age of the members. |
| Statement 1 + 2 | Combining both statements, we have information about the size of the Booster Club and the fraction of members who are under 21 years old. This allows us to determine the number of members under 21. |
(C)ombined we get the answer. Option (C) is the right answer.
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