JEE Main 2023 (Online) 30th January Evening ShiftQuestion 1
The number of seven digits odd numbers, that can be formed using all the seven digits $1,2,2,2,3,3,5$ is
Permutation and Combination
Answer$240$
Solution
Last digit $1$: $\frac{6!}{3!2!}=60$; last digit $3$: $\frac{6!}{3!}=120$; last digit $5$: $\frac{6!}{3!2!}=60$. Total $240$.