Answer:
Step-by-step explanation:
(i)
mode is 2 → x is the highest number, therefore x > 13.
The smallest number that is bigger than 13 is 14
x = 14
(ii)
median is 1 → the middle number is between the (6+1)th and the (6+13)th number → the middle number is between the 7th and the 19th unit.
In order x maximum, then the middle unit has to be the 19th unit →
Total number of people who have 2 or 3 phones = 19 - 1
= 18 people
x + 2 = 18
x = 16
(iii)
mean = 1
[0(6) + 1(13) + 2(x) + 3(2)] ÷ (6 + 13 + x + 2) = 1
(19 + 2x) ÷ (21 + x) = 1
19 + 2x = 21 + x
x = 2
