Vey A forest ranger wants to do a quick survey to check the general health of the trees in his care.
Oak 40
Beech 32
Walnut 8
Pine 64
Spruce 16
He has enough time to survey 60 trees and he wants to do a stratified survey.
How many oaks should he survey.
How many pine should he survey
[3]
40
These are: :
Beech
32
Walnut
8
Pine
64
Spruce
16
He has enough time to survey 60 trees,
and he wants to do a stratified survey.

Oak 40
Beech 32
Walnut 8
Pine 64
Spruce 16

How many oaks should he survey?
How many pines should he survey?