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Numerical Ability
How many 6-digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 and 7 so that the digits should not repeat and the second last digit is even?
A. 320 [TICT, DCRU]
B. 720
C. 6480
D. 2160
Read Solution (Total 1)
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- B.720
let last digit is 2
when second last digit is 4 remaining 4 digits can be filled in 120 ways,similarly is second last digit is 6 remaind 4 digits can be filled in 120 ways,
so for last digit=2,total numbers=240
last digit=4,tot no=240
and last =6,tot no=240
so total of 720 even numbers are possible
- 9 years agoHelpfull: Yes(0) No(0)
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