Monday = 3/10 = (3*2)/(10*2) = 6/20
Tuesday = twice on Monday = 2*(6/20) = 12/20
Wednesday = 1/4 = (1*5)/(4*5) = 5/20
Thursday = 1/2 = (1*10)/(2*10) = 10/20
Friday = 2/5 = (2*4)/(5*4) = 8/200
Today = Sum of each day = (6/20) + (12/20) + (5/20) + (10/20) + (8/20)
= (6 + 12 + 5 + 10 + 8) / 20
= (41)/20
= 41/20 inches.
Option C.
Hope this helps.
