Pls just answer number 19 I will mark brainliest
1 answer:
You might be interested in
Answer:
The no. of possible handshakes takes place are 45.
Step-by-step explanation:
Given : There are 10 people in the party .
To Find: Assuming all 10 people at the party each shake hands with every other person (but not themselves, obviously) exactly once, how many handshakes take place?
Solution:
We are given that there are 10 people in the party
No. of people involved in one handshake = 2
To find the no. of possible handshakes between 10 people we will use combination over here
Formula :
n = 10
r= 2
Substitute the values in the formula
No. of possible handshakes are 45
Hence The no. of possible handshakes takes place are 45.
Say that you're thinking of number
You multiply it by 8, and have
You add -1 (i.e., you subtract 1) and have
This equals -17, so you have
Add 1 to both sides
Divide both sides by 8:
So, you were thinking of -2.