Answer:
7 cones of 1 scoop ice cream were sold.
Step-by-step explanation:
A total of 15 scoops were sold .
Let x be the number of 2 scoop ice cream and y be the number of 1 scoop ice cream
Then
15= 2x+ y---- eq. 1
There were 11 cones sold.
and x+ y = 11--- eq.2
11-x= y
15= 2x+ y
Putting value of y from eq.2 in eq. 1
15= 2x + 11-x
15= x+11
15- 11= x
x= 4
There will be 2*4=8 scoops for 4 cones
ie 4 cones of two scoops ice creams will be sold.
11- 4= 7 cones
and 7 scoops for 7 cones