There are 120 marbles in Dana's collection. The number of her grey marbles is 5 times the number of her white marbles.
- How many white marbles does she have?
- How many grey marbles does she have?
(a)
Number of white marbles = 1 u
Number of grey marbles = 5 u
Total number of marbles
= 1 u + 5 u
= 6 u
6 u = 120
1 u = 120 ÷ 6 = 20
Number of white marbles
= 1 u
= 20
(b)
Number of grey marbles
= 5 u
= 5 x 20
= 100
Answer(s): (a) 20; (b) 100