10, 11, 12, 13, 13, 14, 15, 18, 19, 20

Mean (Average) - add all numbers, then divided by the number of terms.

= (10+11+12+13+13+14+15+18+19+20)÷10

= 145÷10

=14.5

Median - nasa gitna na number from least to greatest.

- If odd yung number of terms, kukunin lang yung number na nasa gitna.

- If even yung number of terms, i-add yung dalawang number sa gitna and ididivide by two(average).

Since yung given ay may 10 terms(even), add two number na nasa gitna and divided by two(average)

=(13+14)÷2

=27÷2

=13.5

Mode - yung pinaka-nauulit na number.

= 13