Digital ACT Math Practice Question #2091
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
On TI-84, press MATH -> PRB -> 3:nCr. Enter 9 nCr 4 to instantly retrieve 126.
Because the order of selection does not matter for a committee, this is a combination: $_9C_4 = \frac{9 \times 8 \times 7 \times 6}{4 \times 3 \times 2 \times 1} = \frac{3024}{24} = 126$....
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