Answer:
Number of friends Ming has = 28
Explanation:
Let number of friends be x
Ming won lollipops = 121
after distribution he left with = 9
number of lollipops he distributed to friends = total won - left = 121-9
= 112 lollipops
each friend got = 4 lollipops
total lollipops = 4(x )
from given information
4x = 112
x = 28
therefore number of friends Ming has 28