There are 7 females and 6 males in a grade 12 class. Now we want to create a group with 5 students to discuss about project stuff. How many ways can you group if at least 3 male students must be included?

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Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

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