# find combinations

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• November 2nd 2007, 12:07 AM
CyanSnow
find combinations
Please solve the problem below:

Q. From a group of 10students, 6 are to be chosen for a picnic party. There are 3students who decide that either all of them or none of them will join. In how many ways can the picnic party be chosen?
• November 2nd 2007, 04:04 AM
Plato
${7 \choose 3} + {7 \choose 6}$