From the binomial theorem, we know that
$$\left(x+y\right)^n=^nC_0x^ny^0+^nC_1x^{n-1}y^1+^nC_2x^{n-2}y^2+.\ .\ .\ .\ .+^nC_nx^0y^n$$
with $$T_r=^nC_rx^{n-r}y^r$$
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From the binomial theorem, we know that
$$\left(x+y\right)^n=^nC_0x^ny^0+^nC_1x^{n-1}y^1+^nC_2x^{n-2}y^2+.\ .\ .\ .\ .+^nC_nx^0y^n$$
with $$T_r=^nC_rx^{n-r}y^r$$
Other Probability, Combinatorics Formulas
Arrangement, permutation and combination formulas
Basic Probability
Expected value
Basic Counting
Educational materials for CAT preparation
