WBJEE Permutations and Combinations — practice questions
6 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice WBJEE Permutations and Combinations in the app →The value of $5!$ is:The number of ways to arrange $n$ distinct objects in a row is:$^{n}P_r$, the number of permutations of $n$ distinct objects taken $r$ at a time, equals:$^{n}C_r$, the number of combinations of $n$ distinct objects taken $r$ at a time, equals:How many different 4-digit numbers can be formed using the digits $1, 2, 3, 4, 5$ without repetition?In how many ways can a committee of $3$ persons be chosen from a group of $10$ people?