leap year tuesday

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maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

by maihuna » Sat Aug 15, 2009 1:56 am

If a leap year is selected at random, what is the chance that it will contain 53
tuesdays?

Charged up again to beat the beast

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Source: Beat The GMAT — Problem Solving | Sat Aug 15, 2009 1:56 am

dtweah: Master | Next Rank: 500 Posts; Posts: 487; Joined: Fri Mar 27, 2009 5:49 am; Thanked: 36 times

Re: leap year tuesday

by dtweah » Sat Aug 15, 2009 4:53 am

maihuna wrote:If a leap year is selected at random, what is the chance that it will contain 53
tuesdays?

Leap year has 366 days. 52 weeks (these have 52 Tuesdays) and 2 days. For there to be 53 tuesdays, one of the additional 2 days must be a TUESDAY.

There are 7 days in a week. 2C1/7=2/7

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