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Forums › Ask CIMA Tutor Forums › Ask CIMA BA2 Tutor Forums › Probability

- This topic has 1 reply, 2 voices, and was last updated 2 years ago by Cath.

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- May 3, 2021 at 12:40 pm #619536
A survey was carried out to find out whether the mode of travel to work differed significantly between commuters aged over and under 30. 60 commuters were interviewed, half from each age group. Twice as many under 30s took a car to work compared with taking public transport and only one over 30 used public transport. 25% of the commuters walked, three-fifths of whom were over 30.

What is the probability that a motorist is under 30?

The answer is 0.44 but ..

Could you please explain the answer of the below?

Thank you

June 1, 2021 at 5:53 pm #622685So its 45 commuters

15 walkersOf the 15 (there are 6 under 30)

So thats 24 left.Of this 2:1 ratio car to public thus 16 in car…

16/36 is 0.4444

Hope thats ok

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