Select three (3) coins, but assume that there are 4 dimes, 3 nickels, and 2 quarters.
In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?

Question

Select three (3) coins, but assume that there are 4 dimes, 3 nickels, and 2 quarters.  
In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?

anonymous · Answer

10C3 - 3C3 - (3C2)(5C1) = 104

so you find the number of ways to choose three coins then subtract the # ways that you can get less than 25 cents. so (3 nickles) and (2 nickels and one dime)

anonymous · Answer

yo i just did the math^^

anonymous · Answer

thanks but i put it into my webwork and it was wrong sorry

anonymous · Answer

oh ok