Question

The stem-and-leaf plot shows the ages of the volunteers at a beach cleanup.

How many of the volunteers were less than 20 or older than 40 years old?

Answer 1

@Michele_Laino

Answer 2

the notation:
\(1|7 \;7\;8\;9\) means \(17,\;17,\;18,\;19\)?

Answer 3

in that case, from the table I read this:
we have four persons under 20: \(17,\;17,\;18,\;19\)
and five persons over 40:
\(45,\;46,\;46,\;53\)

Answer 4

oops.. four* persons over 40

Answer 5

4 people less than 20 and 4 over 40

Answer 6

yes!

Answer 7

Thanks

Answer 8

:)