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Combinatorics

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Moderate

A Sum in Pascal's Triangle

COMBIN-LX4ULY

Which expression is equal to the sum:

$${19\choose 14} + {19\choose 15}?$$

A

${19\choose 16}$

B

${20\choose 5}$

C

${20\choose 14}$

D

${20\choose 16}$

E

none of the above