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# A group of high school people all born in the same year attended

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Senior Manager
Joined: 24 Jun 2012
Posts: 379
Location: Pakistan
GPA: 3.76
A group of high school people all born in the same year attended  [#permalink]

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19 Jul 2017, 06:07
00:00

Difficulty:

25% (medium)

Question Stats:

75% (00:50) correct 25% (00:58) wrong based on 21 sessions

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A group of high school people all born in the same year attended the reunion in 2016. Did at least two people at the reunion have the same birthday?

a) Less than 400 people attended the reunion
b) Of the people who attended the reunion, 75 were born on Friday.

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Re: A group of high school people all born in the same year attended  [#permalink]

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19 Jul 2017, 06:15
sananoor wrote:
A group of high school people all born in the same year attended the reunion in 2016. Did at least two people at the reunion have the same birthday?

a) Less than 400 people attended the reunion
b) Of the people who attended the reunion, 75 were born on Friday.

Hi..

In a year there are 365 days..
Let's see the statements..
A) less than 400 people attended the reunion.
If <365, each person can be born on different day...And NO
If >365... Surely YES
Insufficient
B) 75 were born on Friday..
Number of Friday =365/7=52-53..
Surely some are born on SAME Friday
Ans YES
Sufficient

B
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Re: A group of high school people all born in the same year attended   [#permalink] 19 Jul 2017, 06:15
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