Please help!!!

There are 32 classical asanas: 13 are seated poses, 6 are standing poses, 5 are lying down, 4 are arm balances, and 4 are leg balances. Mr. Glasgo puts together a random sequence of 9 asanas without repetition for his morning yoga routine. What is the probability that his sequence starts with a seated pose or ends with a standing pose? (4 decimal places) A school has 33 students taking Art, 31 taking Ballet, and 18 taking Calculus. 17 students take both Art and Ballet; 11 take Ballet and Calculus; 9 take Art and Calculus. 5 students take all three courses. How many students are taking precisely 2 classes