Answer:
There are 28 biscuits in a small size.
There are 112 biscuits in a medium size.
There are 196 biscuits in a large size.
Step-by-step explanation:
Tin of biscuits come in three sizes:
Let S denote biscuits in small size.
Let M denote biscuits in medium size.
Let L denote biscuits in large size.
There are 28 biscuits in a small size and four times as many in the medium size.
Mathematically,
S = 28
M = 4S
Substitute S = 28
M = 4(28)
M = 112
In the large size there are seven times as many as in small size.
L = 7S
Substitute S = 28
L = 7(28)
L = 196
Therefore,
There are 28 biscuits in a small size.
There are 112 biscuits in a medium size.
There are 196 biscuits in a large size.