The answer is 360 because if u do this 20×36 and the 1/2 it u get this 360 20×36 is 720 and then 2÷720 u get 360
This is a simple problem based on combinatorics which can be easily tackled by using inclusion-exclusion principle.
We are asked to find number of positive integers less than 1,000,000 that are not divisible by 6 or 4.
let n be the number of positive integers.
∴ 1≤n≤999,999
Let c₁ be the set of numbers divisible by 6 and c₂ be the set of numbers divisible by 4.
Let N(c₁) be the number of elements in set c₁ and N(c₂) be the number of elements in set c₂.
∴N(c₁) =
![\frac{999,999}{6} = 166666](https://tex.z-dn.net/?f=%20%5Cfrac%7B999%2C999%7D%7B6%7D%20%3D%20166666)
N(c₂) =
![\frac{999,999}{4} = 250000](https://tex.z-dn.net/?f=%20%5Cfrac%7B999%2C999%7D%7B4%7D%20%3D%20250000)
∴N(c₁c₂) =
![\frac{999,999}{24} = 41667](https://tex.z-dn.net/?f=%20%5Cfrac%7B999%2C999%7D%7B24%7D%20%3D%2041667)
∴ Number of positive integers that are not divisible by 4 or 6,
N(c₁`c₂`) = 999,999 - (166666+250000) + 41667 = 625000
Therefore, 625000 integers are not divisible by 6 or 4
Answer:
There are 45 stamps from Africa
Step-by-step explanation:
10% of 150 is 15
30% of 150 is 45
15*3 = 45
Answer:
x = 18
Step-by-step explanation:
Given
6 - x = - 12 ( subtract 6 from both sides )
- x = - 18 ( multiply both sides by - 1 )
x = 18
Option B is not a solution.
5y=3x+15
5(12)=3(-15)+15
60=-45+15
60≠-30
Hope I didn't mess up for your sake!