3 years ago

There are 7 males and 5 females and we need to select 4 different people. how many ways can we select 4 people?

Mathematics

1 answer:

saul85 [17]3 years ago

5 0

$\displaystyle \binom{12}{4}=\dfrac{12!}{4!8!}=\dfrac{9\cdot10\cdot11\cdot12}{2\cdot3\cdot4}=495$

You might be interested in

K^2+5k-6=0 quadratic formula

s2008m [1.1K]

I hope this helps you

1.k^2+5k-6=0

a=1

b=5

c= -6

disctirminant =b^2-4ac

disctirminant =5^2-4.1. (-6)

disctirminant =49

x1= -(5)+ square root of 49/2.1

x1=-5+7/2

x1=1

x2= -5- square root of 49/2.1

x2= -5-7/2

x2= -6

7 0

3 years ago

300 x 400 = 1200 the same as 3 x 4 = 12

ELEN [110]

Answer:

3x4=12 is 300x400=1200 but it is not multiplied by 100

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Please help me. I have been struggling with prob and stats.

Paraphin [41]

Answer:

Step-by-step explanation:10

3 0

3 years ago

What are the prime factors of 117?

garik1379 [7]

The answer is

3^2 times 13

3 0

3 years ago

Read 2 more answers

Nakita rode her skateboard at an average speed of 8.8 feet per second for 0.2 miles. She wants to calculate how long it took her

timama [110]

Answer: $2\ minutes$

Step-by-step explanation:

We know that:

$d=rt$

Where "d" is distance, "r" is rate and "t" is time.

Solved for the time "t":

$t=\frac{d}{r}$

The first step is to convert the distance from miles to feet.

Since $1\ mile=5,280\ feet$ , we get:

$d=(0.2\ mi)(\frac{5,280\ ft}{1\ mi})\\\\d=1,056\ ft$

Knowing that:

$r=8.8\ \frac{ft}{s}$

We can substitute values into $t=\frac{d}{r}$ in order to find the time in seconds:

$t=\frac{1,056\ ft}{8.8\ \frac{ft}{s}}\\\\t=120\ s$

Since:

$1\ minute = 60\ seconds$

The time in minutes is:

$t=(120\ s)(\frac{1\ min}{60\ s})\\\\t=2\ min$

7 0

4 years ago