Question

Plz, help me with this question!

Answer 1

Answer:

870

Step-by-step explanation:

Assuming you mean

30$P_{2}$

Using the definition

n$P_{r}$ = $\frac{n!}{(n-r)!}$

where n! = n(n - 1)(n - 2) ..... 3 × 2 × 1

Then

30$P_{2}$ = $\frac{30!}{28!}$ = $\frac{30(29)(28)(27)...}{28(27)(26).....}$

Cancel the terms 28(27)... on numerator/ denominator, leaving

30$P_{2}$ = 30 × 29 = 870