Sapphires 45461

The jeweler selects three gems in the ring. It has rubies, emeralds, and sapphires. How many choices does it have?

Correct answer:

x =  10

Step-by-step explanation:

C3(5)=(35)=3!(53)!5!=2154=10 n=3 k=3   C(n,k) = C (n+k1,k) = (kn+k1) x=(kn+k1)=(33+31)=10

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