There are 114 marbles in Cathy's collection. The number of her red marbles is 2 times the number of her white marbles.
- How many white marbles does she have?
- How many red marbles does she have?
(a)
Number of white marbles = 1 u
Number of red marbles = 2 u
Total number of marbles
= 1 u + 2 u
= 3 u
3 u = 114
1 u = 114 ÷ 3 = 38
Number of white marbles
= 1 u
= 38
(b)
Number of red marbles
= 2 u
= 2 x 38
= 76
Answer(s): (a) 38; (b) 76