Bece objective questions and solutions on statistics, plane geometry
Mathematics
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7 stepsHere are some objective questions and solutions on statistics and plane geometry.
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Find the mean of the following set of numbers: 2, 5, 8, 3, 7.
- a) 2
- b) 5
- c) 7
- d) 8
Solution:
The mean (or average) of a set of numbers is calculated by summing all the numbers and then dividing by the count of the numbers.
Sum = 2 + 5 + 8 + 3 + 7Calculate the sum of the numbers.
Sum = 25Count how many numbers are in the set.
There are 5 numbers.
Mean = (Sum of numbers) / (Count of numbers)
Mean = (25)/(5)Perform the division.
Mean = 5 **Answer: b) 5**2. In a triangle, two of the angles measure 60° and 70°. What is the measure of the third angle? * a) 50° * b) 60° * c) 70° * d) 80°
Solution:The sum of angles in a triangle is always 180°.
Let the third angle be x. 60° + 70° + x = 180°Add the known angles.
130° + x = 180°Subtract 130° from both sides to solve for x.
x = 180° - 130° x = 50° **Answer: a) 50°**
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