Generating random samples

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Which of the following statement about pascal's triangle are true?