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[JEE Main 2002] The number of four-digit odd numbers formed using $0,1,2,3,5,7$ (repetition allowed) is

VAVidaara Admin Asked 1mo ago 2 views 1 answer
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The number of four-digit odd numbers formed using $0,1,2,3,5,7$ (repetition allowed) is

(a) $216$
(b) $375$
(c) $400$
(d) $720$

1 Answer

VAVidaara Admin ✓ Vidaara Team ✓ Accepted · 1mo ago ▲ 0

Correct answer: (d) $720$

Last digit odd ($1,3,5,7$): $4$; first digit non-zero: $5$; middle two: $6$ each. $5\cdot6\cdot6\cdot4=720$.

JEE Main 2002 · Permutations and Combinations — verified solution by the Vidaara Team.

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