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In a leap year, what is the probability that the number of Sunday's is

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In a leap year, what is the probability that the number of Sunday's is  [#permalink]

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New post 01 Apr 2020, 22:10
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In a leap year, what is the probability that the number of Sunday's is 53?

A) 1/7
B) 1/6
C) 2/7
D) 2/6
E) 3/7
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Status: Today a Reader; Tomorrow a Leader.
Joined: 14 Oct 2019
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WE: Engineering (Energy and Utilities)
Re: In a leap year, what is the probability that the number of Sunday's is  [#permalink]

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New post 01 Apr 2020, 22:22
A leap year has 366 days.
A year has 52 weeks. Hence there will be 52 Sundays for sure.
52 weeks = 364 days
366 – 364 =2 days
In a leap year there will be 52 Sundays and 2 days will be left.
These 2 days can be:
1. Sunday, Monday
2. Monday, Tuesday
3. Tuesday, Wednesday
4. Wednesday, Thursday
5. Thursday, Friday
6. Friday, Saturday
7. Saturday, Sunday
Of these total 7 outcomes, the favourable outcomes are 2.
Hence the probability of getting 53 sundays = 2/7

correct answer is c
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In a leap year, what is the probability that the number of Sunday's is  [#permalink]

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New post 02 Apr 2020, 01:35
leap year has 366 days
we have 366 = 7*52 +2 : (52 weeks and 2 extra days)
2 extra days we can have {sat,su ; su,mo ; mo,tu ; tu,we ; we,th ; th,fr ; fr,sa}
2 out of these 7 ways has an extra sunday
so ,2/7 is the probability
ANSWER:C
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In a leap year, what is the probability that the number of Sunday's is   [#permalink] 02 Apr 2020, 01:35

In a leap year, what is the probability that the number of Sunday's is

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