Problem solving - BMAT

Practice Question Solving
1

The table below shows the results of a survey into salt intake as estimated by measuring urinary sodium levels. The results are expressed cumulatively. The recommended maximum daily intake of salt is 6 grams.Image title

Calculate (by interpolation) the median salt intake for women in the survey (the median is the amount taken by 50% or less of those in the survey). Express your result to the nearest 0.1g.

A

7.1

B

7.2

C

7.3

D

7.10

E

7.6

can someone explain how to do this ? :slight_smile:
answer is E

2

Hi Hasali!
As it’s mentioned in this passage, the median is the amount taken by 50% or less of those women in the survey.
50% is between 31% and 66% for all women in this table; cause we don’t have an actual 50%. Hence, this percentage is between 6g and 9g.
31% 50% 66%
6g X 9g
X-6/9-6=50-31/66-31
X-6/3=19/35
Therefore X=57/35+6=7.6

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3

Thankyou, I think I get it now. :slight_smile:

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