Question

In a box of marbles , 3
8
of the marbles are red, 2
5
are blue and the rest are green. Of
the red marbles, 2
9
are spotted. Find the fraction of marbles that are : (a) green, (b)
red but not spotted.

Answer 1

Answer:

we need more data that is total number of marble

Answer 2

Answer:

Green : 9/40

Red but not spotted: 7/24

Step-by-step explanation:

Fraction of Green Marbles = 1 - (3/8 + 2/5) = 1 - (31/40) = 9/40

Red but not spotted = (Fraction of red marbles) * (Fraction of red but not spotted)

= 3/8 x (1 - 2/9) = 3/8 x 7/9 = 21/72 = 7/24