The question is asking 'how many different ways can we pair two diplomats to shake hand'?
The combination formula is given by:

We have n = 25 and r = 2
Substituting into the formula we have

handshakes
Answer:
<h2> 3/11</h2>
Step-by-step explanation:
FORMULA= P(A)=
NUMBER OF FAVORABLE OUTCOMES
-------------------------------------------------------------
NUMBER OF POSSIBLE OUTCOMES
GIVEN: 12 Guitars, 10 Bass, 9 Drums, 12 Keyboards
WANT: The probality a seventh grader chosen at randome will play drums
add all the instruments
12+10+9+12=33
there are 9 drums
FOLLOW THE FORMULA
9 3
---- = ---- SIMPLIFIES FORM
33 11
AB is 10 units long, so a ratio of 2:3 translates to 4:6 in units.
4 units ahead of A is 4+4 = 8
The answer is (8, 1)
It’s continuous:)
Hope this helps!