Question

Medal!!!

A 150-unit apartment complex is infested with rats. The apartment caretaker checked 9 units and found the following number of rats: {2, 5, 3, 1, 0, 3, 7, 2, 2}. What is the frequency of units with 2 rats?
A. 1
B. 2
C. 3
D. 4

Answer 1

@Mathard would I do the same thing you did with the simialr question?

Answer 2

Im getting 2 for my answer, is that correct?

Answer 3

Basically count how many times the number 2 is in the set. Then divide that by the number of units. Don't add them or multiply them, just count them.

Answer 4

Divide by the number of units checked (since they haven;t checked the other units, you can't know how many rats are there)

Answer 5

okay 9/3=3

Answer 6

correct?

Answer 7

close! but its = number of times 2 is there / number of units checked

Answer 8

as a hint, the total number of units checked will always be the divisor (number below the / )

Answer 9

so 9 units were checked and their are 3 sets of 2. so it wouldnt be 9 divided by 3?

Answer 10

no, backwards. You divide the number of sets of 2 (3) by the number of units checked (9).

Answer 11

okay i got 0.3 doing it backwards

Answer 12

oh wait i misread the question. it says frequency not relative frequency. In that case its only counting the number of times, that's it. Sorry!!

Answer 13

so 3 correct?:)

Answer 14

yes, haha, my bad. made it more complicated

Answer 15

its okay! it happens lol