Ayoninu S.

asked • 02/13/18

Friday the 13th

Some people think it is unlucky if the 13th day of a month falls on a Friday. Show that in every calendar year( non-leap or leap) there will always be at least one such unlucky Friday but there can be no more than three.

1 Expert Answer


David W. answered • 02/13/18

4.7 (80)

Experienced Prof

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