4200/70
take out a zero on both top and bottom
420/7
Simplify
= 60
Hope this helps!
Brainliest and a like is much appreciated
Answer:
Step-by-step explanation:
um that question doesnt make any sense....
Answer:
(A) it's just a guess but its the only answer that fits with the question
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
