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elena55 [62]
2 years ago
7

there are 30 students in Sam's history class. out of that number, 18 are girls. If one student is absent, what is the probabilit

y that the student will be a girl?
Mathematics
2 answers:
Cerrena [4.2K]2 years ago
7 0
I’m fraction form, the answer would be 12/30. The fraction as a simplified version is 2/5.
dmitriy555 [2]2 years ago
5 0
60% chance that a girl would be absent
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Answer:

Option D.

Step-by-step explanation:

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  • Next, we know that the formula for calculating the area of a right angled triangle is given by:

        A = 1/2 (base × perpendicular height)

  • The perpendicular height is equal to the base. Let's say the base is <em>x</em>. It means that the height is also x, since height = base.
  • Therefore, the formula will be:

       A = 1/2 (x.x)

           =1/2 (x²)

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     Multiplying both sides by 2 gives:

     32×2 = x²

     64  = x²

       8   = x

To find the third side, we use the Pythagoras theorem:

    C² = A² + B²

         = 8² + 8²

         = 128

   C = √128

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However, the answer will not be exact, so we  multiply the length of the base and height by 2. This gives x = 16 (Length of base = length of height)

Repeating the steps above gives C = √ (16)² + (16)²

                                                           = √256

This corresponds to option D.

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Step-by-step explanation:

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