Q. 635.0( 2 Votes )

Using the digits 1, 2, 3, 4, 5, 6, 7, a number of 4 different digits is formed. Find


Answer :

Given:-total number of digit to be form=4



=7P4=840



Number which are ending with 2


6P3=120


Number which are ending with 4


6P3=120


Number which are ending with 6


6P3=120


how many numbers are exactly divisible by 2=120+120+120=360



=40



The number which last two digit divisible by 4


Are 12,16,24,32,36,44,52,56,64,72,76


11P2.5P2


=200


Answer is above in table



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