In a group of 50 people, 38 are women, 23 have dark hair. 16 are women with dark hair. One person is selected. What is the probability the person is a man with dark hair?

Probabilty that the person is a man with dark hair = 0.14.

Step-by-step explanation:

38 are women (given)

So, 50 - 38 = 12 are men.

23 have dark hair and 16 are women with dark hair (given)

So, 23 - 16 = 7 men with dark hair.

Thus, probability = number of men with dark hair / number of people

Probability = 7 / 50 = 0.14

P ( WD ) = 0.14

Step-by-step explanation:

Solution:-

- In the given group we have total , T = 50 people

- Number of women , W = 38

- Number of men, M = T - W = 50 - 38 = 12

- People with dark hair, D = 23

- Women with dark hair, WD = 16

- Men with dark-hair, MD = D - WD = 23 - 16 = 7

- The probability of selecting a person who is a man with dark hair is:

                       P ( WD ) = Possible men with dark hair / Total people in group

                       P ( WD ) = WD / T

                       P ( WD ) = 7 / 50

                       P ( WD ) = 0.14

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this