Anyone help me with these questions please

1.

Suppose that Kim is the philanthropy chair of her sorority, and she wants to choose a committee of five of her sorority sisters to help her plan their annual charity soccer tournament. However, when she asks for volunteers, 13 of her sisters are willing to help. Not wanting to play favorites, Kim decides to randomly select her five committee members from the 13 volunteers. How many different committees of five members are possible using this method?Suppose that of the 143 patients who visited Doctor Baptiste's ofce this week, 41 had high LDL cholesterol, 32 had hypertension, and 88 had neither high LDL cholesterol nor hypertension. Let C be the number of patients with high LDL cholesterol and H the number with hypertension. How many patients had both high LDL cholesterol and hypertension, IC n H | ? What is the probability that a randomly chosen patient had high LDL cholesterol and hypertension, P(C n H)? Express the result with precision to three decimal places. What is the probability that a randomly chosen patient had either high LDL cholesterol or hypertension, P(C U H)? Express the result with precision to three decimal places. Suppose that Jeremy is a high school a science teacher and that he is dividing the 12 students in his advanced chemistry class into four groups of three for a lab activity. Each of the four lab groups has been assigned its own task to complete for the activity, but the students are not assigned specic roles within each group. How many different ways can Jeremy assign his students to the four lab groups? :1 / TOOLS x1 0y