MATH SOLVE

3 months ago

Q:
# Every 8th person that goes into a store gets a free bottle. Every 10th person that goes into a store gets a t-shirt. There are 100 bottles and 100 t shirts to give out. How many people get a t shirt and a bottle

Accepted Solution

A:

25 persons will get both bottle and t – shirt.
Solution:Given, every 8th person that goes into a store gets a free bottle. And every 10th person that goes into a store gets a t-shirt. There are 100 bottles and 100 t shirts to give out. We have to find how many people get a t shirt and a bottle
Now, as there are 100 t- shirts, last person to get t – shirt is:10 x 100 = 1000th person will get last t – shirt
We have to find lcm of 8 and 10, to know who gets both bottle and t – shirt.
So, L.C.M of 8 and 10 = lcm(8, 10) = 2 x lcm(4, 5) = 2 x 4 x 5 [ as no common factors available for 4 and 5
]= 40
So, every 40th person will get both bottle and t – shirt.
Then, out of 1000 people, number of people who get both bottle and t – shirt = [tex]\frac{1000}{40} = 25[/tex]