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# The distribution of blood types within a certain population is shown

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Math Expert
Joined: 02 Sep 2009
Posts: 51188
The distribution of blood types within a certain population is shown  [#permalink]

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26 Jun 2018, 20:03
00:00

Difficulty:

5% (low)

Question Stats:

91% (00:43) correct 9% (00:42) wrong based on 83 sessions

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The distribution of blood types within a certain population is shown in the table. What is the probability that a person chosen at random from the population will be a person who has blood type AB ?

A) 0.04

B) 0.044

C) 0.4

D) 0.51

E) 0.56

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nT54pED.jpg [ 21.83 KiB | Viewed 712 times ]

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Re: The distribution of blood types within a certain population is shown  [#permalink]

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26 Jun 2018, 21:08

Solution

Given:
• In the given table, the distribution of blood types within a certain population is shown

To find:
• The probability that a person chosen at random from the population will be a person with blood type AB

Approach and Working:
As the total population should represent 100%, we can write
• 45% + 40% + 11% + x% = 100%
Or, x% = 100% - 96% = 4%

Therefore, if a person is chosen at random from the population,
• The probability that the chosen person’s blood group will be type AB = $$\frac{4%}{100%}$$ = 0.04

Hence, the correct answer is option A.

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Re: The distribution of blood types within a certain population is shown  [#permalink]

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29 Jun 2018, 11:22
1

It should be A to my understanding.
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Re: The distribution of blood types within a certain population is shown  [#permalink]

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29 Jun 2018, 22:28
Masterscorp wrote:

It should be A to my understanding.

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Done. Thank you.
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Re: The distribution of blood types within a certain population is shown &nbs [#permalink] 29 Jun 2018, 22:28
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