Question

the marks of 20 students in mathematics ( out of 50 ) are as follows. 45, 50,35 ,40, 35 ,30,45,30,45,30,35 ,40,45,45,50,35,45,30, and 50

the range of the above data is

please answer​

Answer 1

Range=Highest observation -Lowest observation
=50-30
=20