Among freshmen pursuing a business degree at a university 60

Among freshmen pursuing a business degree at a university, 60% are enrolled in an Economics class, 45% are enrolled in a Mathematics class, and 30% are enrolled in both Economics and Mathematics. What is the probability that a freshman is enrolled in If there are 10 men waiting to meet with a supervisor for a promotion. Only four of them have a chance of getting an interview. How many ways can the group of 4 be determined? nCr If there are 10 men waiting to meet with a supervisor for a promotion. Only four of them have a chance of getting an interview. How many ways can the group of 4 ^determined, if the first person interviewed has the best chance of getting the promotion, the second has the next best chance...? nPr

Solution

Only Maths = 15% and only economics = 30%

Neither = 100-(15+30+30) = 25%

Exactly one = 15+30 = 45%

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In 10C4 ways =210

In 10P4 = 10x9x8x7

= 5040