To determine the number of trout in a lake, a conservationist catches 136 trout, tags them and throws them back into the lake. later, 60 trout are caught; 15 of them are tagged. how many trout would the conservationist expect to be in the lake?

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.