potatoe456
New Member
- Joined
- Jun 6, 2024
- Messages
- 4
- Gender
- Female
- HSC
- 2025
pls help with the following qs (idk where to even start)
1. How many selections of at least one object can be made from n distinct objects?
2. Recall that a digit sum of a number n is the value obtained when the digits of n
are added together. For example, the digit sum of 152 is1+5+2=8.
(a) How many four-digit numbers must be selected to guarantee that at least two of them have
the same digit sum?
(b) 110 randomly -chosen three-digit numbers are selected. Show that at least five of them have
the same digit sum.
1. How many selections of at least one object can be made from n distinct objects?
2. Recall that a digit sum of a number n is the value obtained when the digits of n
are added together. For example, the digit sum of 152 is1+5+2=8.
(a) How many four-digit numbers must be selected to guarantee that at least two of them have
the same digit sum?
(b) 110 randomly -chosen three-digit numbers are selected. Show that at least five of them have
the same digit sum.