Aphysics class has 40 students. of these, 17 students are physics majors and 16 students are female. of the physics majors, seven are female. find the probability that a randomly selected student is female or a physics major.

Probability of female   P(f)   =  0,575    or   57,5  %

Probability of physic majors  P = 0,425 or  42,5 %

Step-by-step explanation:

a) Probability that a random selected student is female:

Let call P(f)  such probability   is  P(f1)  + P(f2)

we have to evaluate 2 branch of the tree, working as follows

1.Probability of students as physics major is P(f1)

17/40     and after that the probability of student physics majors being female is 7/17, Therefore for that side we have probability

P(f1)  = ( 17/40)* (7/17)    =  119/680

2.-Probability of students as female from 40 student is

16/40

Then   P(f)  = ( 119/680) + 16/40       P(f)  = 391/680

P(f)  = 0,575    or    57,5%

b) Probability of physics majosr is:

P(pm)  =  17/40

P(pm)  =  0,425     or   42,5 %

i'm not sure what you mean but in todays world there is a lot of women that are the bread winners in the family. there is a lot more single mothers now that are going back to get an education which is boosting the economy. i believe there has been a boost in the economy due to women the cosmetic industry is boosting, chemist, the sky is becoming the limit for women in todays economy. most women are also putting off having kids just to make sure they have a education. i don't know how these two relate though to scriptures because it's not the way the lord wanted it. the man is suppose to be the bread winner and due to social media and the easy access we have there is a lot of cheating going on.

step-by-step explanation: