A park ranger calculated that 60% of the deer they tagged were male. Of the male deer that were tagged, 20% of them were older than 4 1/2 years. They tagged 18 male deer that were older than 4 1/2 years. How many deer did they tag?

The park ranger tagged 20 deers

60% of the deer tagged were male ... 40% were female

of the male deer, 20% were older then 4 1/2 years ... and 18 male deer were older then 4 1/2 years ...

so 20% of the male deer tagged = 18

0.2x = 18

x = 18 / 0.2

x = 90 ... so there were 90 male deer that were tagged

thats means 60% of the total deer = 90

0.6x = 90

x = 90/0.6

x = 150 < = = = so there were a total of 150 deer tagged (male and female)