In how many ways can 6 competitors finish a race assuming there are no ties? in how many ways can we sit n people on r < n chairs? in how many wayscan the gold, silver and bronze medals be awarded in a race of 8 people? howmany 5-digit zip-codes are possible? how many different 3-person committeeswe can make with 10 people?

 a) 720, b) c) 336, d) 30240 e) 120.

Step-by-step explanation:

Since we have given that

a) Number of competitors  = 6

We need to find the number of ways that 6 competitors can finish a race and there are no ties.

So, Number of ways would be

b) number of people = n

Number of chairs = r (r<n)

so, the number of ways we can sit n people on r<n chairs is given by

c) If there are three awards :

Gold, silver, bronze.

We need to find the number of ways that these medals can be awarded.

Number of ways is given by

d) Number of 5-digit zip codes are possible is given by

e) Number of poeple = 10

Number of people required in committee = 3

Number of different 3 person committee that are selected from 10 people is given by

Hence, a) 720, b) c) 336, d) 30240 e) 120.

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step-by-step explanation:

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