Question

The probability that the 13th day of a run-
domly choses month is a Friday, is​

Answer 1

Answer:

Probability of chosen any month out of 12 month =

12

1

And, there are 7 possible ways in which the month can start and it will be a Friday on 13th day, if the first day of the month is sunday.

So, its probability =

7

1

Thus, required probability =

12

1

×

7

1

=

84

1

Hence, the probability that the 13th day of a randomly chosen month is Friday =

84

1