R= rmax (1-n/k)
i don’t understand? ?

As given r = r(max)/2

k= 50

r(max) = 0.5

By substituting the values,

r= 0.5/2 = 0.25

You have to use following equation to get a value of N

r = r(max) ( 1- N/K)

N/k = 1 - r/r(max)

N/K = 1 - 0.5 = 0.5

N= 50 × 0.5 = 25

4 candies

step-by-step explanation:

7 x 28 = 196

200 - 196 = 4 candies remaining.