Bunuel wrote:

If the probability of snow is the same every day this week, what is the probability of snow on Saturday?

(1) The probability of snow on Monday is 1/7.

(2) The probability having of no snow on both Thursday and Friday is 36/49.

From stimulus

P (Snow )= \(\frac{1}{7}\) (same on Sun, Mon, Tue, Wed, Thur, Fri, Sat)

P (No Snow)= \(\frac{6}{7} (\)same on Sun, Mon, Tue, Wed, Thur, Fri, Sat)

AIM :- FIND P(Snow) on Saturday

(1) The probability of snow on Monday is\(\frac{1}{7}\)

Since P(Snow) on Monday = P (Snow) on Saturday

So P(Snow) on Saturday = \(\frac{1}{7}\)

SUFFICIENT

(2) The probability having of no snow on both Thursday and Friday is \(\frac{36}{49}\)

We know from Stimulus that P (No snow) on Thursday= P (No Snow) on Friday

therefore P (No Snow) Thursday and P(No Snow)Friday \(= \frac{36}{49} = \frac{6}{7}*\frac{6}{7}\)

Therefore P (Snow) on thursday or friday or saturday (since it is same)\(= 1-\frac{6}{7} = \frac{1}{7}\)

SUFFICIENT

ANSWER IS D

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