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. (2) number of students with blood group A = (1) (iii) State the type of variation shown in the graph for the blood groups of students. (1)

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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 find out how many students have blood group A, we first determine the percentage of students with blood group A from the graph. From the graph, it appears that 40% of the students have blood group A.

Next, we calculate the actual number of students:

ext{Number of students with blood group A} = rac{40}{100} imes 650 = 260

Thus, 260 students have 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 graph demonstrates a discontinuous variation in blood groups, as blood types are distinct categories without intermediate values.

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