Answer:
work is shown and pictured
Answer:
2/34
Step-by-step explanation:
Answer:
(a)

(b)

Step-by-step explanation:
Quotient of factorials:
we are given

we can multiply top and bottom term by 21!

we can write as

As a permutation:
we know permutation formula

now, we can compare and find 'n' and 'r'


we can plug back n=25


so, we can write

Answer:
hope this helps buddy, please mark the brainliest.
Step-by-step explanation: