Mike was investigating variation in a school of 650 students. He recorded the blood group and measured the heights of the students. The graph shows the variation in blood group. (a) Calculate how many of the 650 students have blood group A. (II) State the type of variation shown in the graph for the blood groups of students.

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Mike was investigating variation in a school of 650 students - Edexcel - GCSE Biology - Question 4 - 2011 - Paper 1

Question 4

Mike was investigating variation in a school of 650 students. He recorded the blood group and measured the heights of the students. The graph shows the variation in... show full transcript

Worked Solution & Example Answer:Mike was investigating variation in a school of 650 students - Edexcel - GCSE Biology - Question 4 - 2011 - Paper 1

Step 1

Calculate how many of the 650 students have blood group A.

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Answer

To calculate the number of students with blood group A, we first identify the percentage of students with this blood group from the graph. The graph indicates that 40% of students have blood group A.

Using the formula:

$ext{Number of students with blood group A} = rac{40}{100} imes 650$

Now, calculating this gives us:

$rac{40}{100} imes 650 = 0.4 imes 650 = 260$

Therefore, there are 260 students with blood group A.

Step 2

State the type of variation shown in the graph for the blood groups of students.

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Answer

The type of variation shown in the graph for the blood groups of students is discontinuous variation.

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