Question the-ba

3.3 One-Variable Data & Statistics - Mean, median, mode, range
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The bar graph shows the number of each type of monkey in a sanctuary. 

1211109876543210Number of monkeysmandrillbaboonpygmy marmosetbonnet macaquevervet Type of monkey
  • The Number of monkeys data for the 5 bars are as follows:
    • mandrill: 5
    • baboon: 7
    • pygmy marmoset: 8
    • bonnet macaque: 9
    • vervet: 11

How many more vervets are in this sanctuary than mandrills?

A.

6

B.

5

C.

3

D.

11

The bar graph shows the number of each type of monkey in a sanctuary. 12 11

Easy-difficulty · SAT Math · One-Variable Data & Statistics — Mean, median, mode, range. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

Choice B is correct. It's given that the bar graph shows the number of each type of monkey in a sanctuary. The bar representing the number of mandrills has a height of 5 ; therefore, there are 5 mandrills in the sanctuary. The bar representing vervets has a height of 11 ; therefore, there are 11 vervets in the sanctuary. Therefore, there are 11-5, or 6 , more vervets in this sanctuary than mandrills.

Choice A is incorrect. This is the number of vervets in the sanctuary.

Choice C is incorrect. This is the number of mandrills in the sanctuary. 

Choice D is incorrect and may result from conceptual or calculation errors.