Question

please give me an answer ​

Answer 1

(1).mean=sum of observations/no.of observations

mean=2+4+18+12+4+40/6

mean=80/6

mean=13.3333333333333 ANS.

(2)AB^2=AC^2+BC^2

7^2=25^2+BC^2

BC^2=25^2-7^2

BC^2=625-49

BC^2=576

BC=√576

BC=24 ANS.