Median is the middle number and you have to put each set in order like you've done, tick each number off and each side working in: 3,4,-6-,7,8 =6 3,3,-4-,5,5 =4 6,7,-7-,8,9 =7 2,2,-3-,4,6 =3 Mode is the number that shows up the most 3,4,6,7,8= no mode 3,3,4,5,5= 3 and 5 6,7,7,8,9=7 2,2,3,4,6=2
It is given that there are 30 tables in total and there are two types of tables.
Let's call the two seat tables, the first type as x and the second type as y.
∴ x + y = 30 ......(1)
Also a total number of 81 people are seated. Therefore, 2x number of people would be seated on the the first type and 5y on the second type. Hence the equation becomes:
2x + 5y = 81 .....(2)
To solve (1) & (2) Multiply (1) by 2 and subtract, we get:
