Two different age groups were surveyed about the amount of time they spent on social media.
The results are shown in the two frequency
polygons below. The same time intervals were
used for both graphs.
11-year old students
15-year old students
a) How many 15-year old
students took part in
the survey?
801
70
60
801
70
60
50
240
240
b) How many more 15-year
old students than 11-year
old students spent
between 35 and 45 mins
on social media?
L 30
30
20
10
20
10
(1)
Total marks: 2
0
0 10 20 30 40 50 60 70 80
Time (mins)
0
0 10 20 30 40 50 60 70 80
Time (mins)
Next Question

22 and 22

step-by-step explanation:

10 plus 12 equals 22.

12 plus 10 also equals 22 because regardless of what order they're in, they're gonna equal the same thing.

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

3/5

step-by-step explanation:

double number line is not a standard concept, so it must have been defined in your textbook. assume top line is numerator.

step-by-step explanation: