Question

The number of ways of choosing 3 squares from a chessboard so that they have exactly one common vertex

Answer 1

Answer:

The No. Of Squares Which have common vertex in chess Board are The squares which are present in the last line on all four sides.

Step-by-step explanation:

No. of Squares on last line of a chess Board=8

No. Of squares on ast line which have a common vertex=7

Therefore,

7×7 ( Up & Down)

+

7×7 ( Left & Right)

_______________________________

98 (Total Ways Of Selecting 3 Squares)