At Westonci.ca, we connect you with the best answers from a community of experienced and knowledgeable individuals. Our platform offers a seamless experience for finding reliable answers from a network of experienced professionals. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform.

2. A Halloween survey of a gr 9 class on students’ most common fears reveals that 10 students are afraid of heights, 5 students are afraid of being in closed spaces and 15 students are afraid of insects.

a) In how many ways can we select a group of 4 students that are afraid of insects? [1K]

b) In part a), did you use permutations or combinations? Explain. [2C]

c) In how many ways can we select 6 students so that two are afraid of insects, two are afraid of heights and two are afraid of closed spaces? [2K]