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Alik [6]
3 years ago
9

In a high-school, 135 freshmen were interviewed.

Mathematics
1 answer:
charle [14.2K]3 years ago
6 0

Answer:

\dfrac{118}{135}

Step-by-step explanation:

Total Number of Students =135

Number who took all three subjects=5

Number who took PE and BIO=10

Number who took PE and ENG=15

Number who took BIO and ENG=7

Therefore:

  • Number who took PE and BIO only=10-5=5
  • Number who took PE and ENG only=15-5=10
  • Number who took BIO and ENG only =7 -5=2

Total Number of students who took exactly two subjects=5+10+2=17

Therefore:

Number of students who did not take exactly two subjects=135-17=118

The probability that a randomly-chosen student from this group did not take exactly two subjects

=\dfrac{\text{Number of students who did not take exactly two subjects}}{\text{Total Number of students }} \\=\dfrac{118}{135}

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