The question is not clear enough
Creo que 1860? :) lo siento si esta mal
Formula is
ₙCₖ = (n!)/( k!*(n-k)! )
so ₇C₃ = (7!) / (3! * (7-3)!)
and 7! = 7 * 6 * 5 * 4 * 3 * 2 * 1
= (7 * 6 * 5 * 4 * 3 * 2 * 1)/(3 * 2 * 1 * 4!)
= (7 * 6 * 5 * 4)/(4!)
= (7 * 6 * 5 * 4)/(4 * 3 * 2 * 1)
= (7 * 6 * 5 )/(6 * 1)
= (7 * 5 )/( 1)
= 35
1/10 i think hope that helps
Answer:
202.5 minutes which is 3.375 hours
Step-by-step explanation:
Set up a ratio
20/45=90/x so
x=202.5 minutes
then divide by 60 minutes to get hours
