This is a combination problem. The approach to this is by using the nCr method, where n is the number of total objects and r is the number of success. For example, if you want to get 3 red out of the total 4, then that would be 4C3. That means,

4C3 = 4!/3!(4 - 3)! = 4 ways

If you want to get 2 green out of the total 6, then that would be 6C2. That means,

6C2 = 6!/2!(6-2)! = 15 ways

Therefore, there are a total of 4+15 = 19 ways.

8 0

3 years ago

The distance to the nearest exit door is less than 150 feet.

Alja [10]

Answer:

d<150

Step-by-step explanation:

6 0

2 years ago

a satellite cable company charges an installation fee of $50 plus an additional $35.95 per month for service

SashulF [63]

Y=50+35.95x
x is how many months you have it
y is how much you pay total

7 0

2 years ago

A library has 167 trees on their property, but they are having trouble growing grass so they need to pay to have trees cut down

weeeeeb [17]

Answer:

15 years

Step-by-step explanation:

Given:

Number of trees = 167
This year limit = 4 trees
Yearly limit following years = 6 trees per year
Target number of trees = 50

Building inequality:

167 - 4 - 8x < 50
8x > 113
x > 113/8
x > 14.125

Adding current year to 14 we get 15 years as answer

6 0

2 years ago