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Statistics and Sampling

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A survey of 100 students has the following results :
70 of the students stated they are pursuing at least one of the degrees:
Mathematics, Computer Science, or Electrical Engineering. 40 were pursuing a Mathematics degree, 50 were pursuing a Computer Science degree, and 25 were pursuing an Electrical Engineering degree. 23 students were seeking a degree in both Mathematics and Computer Science, 4 a degree in both Mathematics and Electrical Engineering, and 8 a degree in both Computer Science and Electrical Engineering.
a) How many students surveyed were not pursuing any of three degrees mentioned?
b) How many students were pursuing a multiple degree in all three subjects?
c) How many students were pursuing a dual degree?

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A sampling problem is solved. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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