2020 · Q117
The number of ways by which 6 distinct balls can be put in 5 distinct boxes are
general-mental-abilityquantitative-aptitude
- A7776
- B15625
- C720
- D120
Explanation
Each of the 6 distinct balls can independently go into any of the 5 distinct boxes: 5⁶ = 15,625 ways. (7,776 is 6⁵ — the reverse assignment of boxes to balls.)