Choose the best answer. \( nC_r(p)^r(1-p)^{n-r} \) is the formula for ___________. A) variance B) binomial...

2. Choose the best answer.
\( nC_r(p)^r(1-p)^{n-r} \) is the formula for ___________.
A) variance
B) binomial probability
C) standard deviation
D) probability mean
3. Perform the calculation.
\( ^{10}C_4 = \) ____
A) 360
B) 5,040
C) 210