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The heights of three Carpentry and Joinery students of a Technical Institute are 1.50m, xm and 1.45m. If the arithmetic mean height of the three students is 1.60m. calculate the value of x.

Mathematics

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Answer

1.85 m\text{1.85 m}

Step-by-step solution

2 steps

Here's the solution for question 1(a):

  1. Recall the formula for the arithmetic mean and substitute the given values.

    The arithmetic mean is the sum of all values divided by the number of values.
    Given heights are 1.50 m1.50 \, \text{m}, x mx \, \text{m}, and 1.45 m1.45 \, \text{m}.
    The number of students is 3.
    The mean height is 1.60 m1.60 \, \text{m}.

    Mean=Sum of heightsNumber of students\text{Mean} = \frac{\text{Sum of heights}}{\text{Number of students}} 1.60=1.50+x+1.4531.60 = \frac{1.50 + x + 1.45}{3}
  2. Solve the equation for xx.

    First, multiply both sides by 3:

    1.60×3=1.50+x+1.451.60 \times 3 = 1.50 + x + 1.45 4.80=2.95+x4.80 = 2.95 + x

    Now, isolate xx by subtracting 2.95 from both sides:

    x=4.80−2.95x = 4.80 - 2.95 x=1.85x = 1.85

    The value of xx is 1.85 m\boxed{\text{1.85 m}}.

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