Question

If the number of five digit numbers with distinct digits and 2 at the 10^th place is 336k, then k is equal to:

(1) 8

(2) 6

(3) 4

(4) 7

Answer 1

Answer is (1) 8

2

No. of five digits numbers = No. of ways of filling remaining 4 places

= 8 × 8 × 7 × 6

∴ k = (8 x 8 x 7 x 6)/336 = 8

Answer 2

Answer is (1) 8