Answer:
150th customer
Step-by-step explanation:
To find this we would need the lcm lowest common factor of 30 and 75
LCM 30 = 2,5,3,1
LCM 75 = 3,5,5
H.C.F = 2,3,5,5
= 150
the 150th custome would be getting both gift.
-7+n=12
this leaves us with n=19
120
You can find out how many she has graded by multiplying 150 by the decimal version of 20% (.20). Then, subtract the number you get by 150.
