If number of 5 digit numbers which can be formed without repeating any digit while tenth place of all of the numbers must be 2 is 336 k find value of k
(1) 8
(2) 7
(3) 6
(4) 5
Answer is (1) 8
| | | | 2 | |
Number of numbers
= 8 x 8 x 7 x 6 = 2688 = 336k ⇒ k = 8
