The incomplete dot plot shows the result of a survey in which each student was asked how many dimes were in their pockets or wallets. The results for

bobbie71G 2021-02-20 Answered
The incomplete dot plot shows the result of a survey in which each student was asked how many dimes were in their pockets or wallets. The results for "4 dimes" are not shown. Each dot represents one student. It is known that 12.5% of the students had one dime.
a) Find the number of students surveyed. Then complete the dot plot.
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Expert Answer

avortarF
Answered 2021-02-21 Author has 113 answers

Let xx be the number of students surveyed.
If 12.5% of the students had one dime, then 0.125x students had one dime. From the dot plot, 4 students had one dime so 0.125x=4. Dividing both sides by 0.125 gives x=40.125=32
Therefore 32 students were surveyed.
Counting the total number of dots in the incomplete dot plot gives:
2+4+8+9+4+2=29
Since there must be 32 dots in all to represent all 32 of the students, then there should be 3239=3 dots for "4 dimes". The complete dot plot is then:
[Pic]

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