Question

In a class of 18 students, 3 are math majors. A group of four students is chosen at random. (Round your answers to four decimal places.)
(a) What is the probability that the group has no math majors?


(b) What is the probability that the group has at least one math major?


(c) What is the probability that the group has exactly two math majors?

Answer 1

this is a binomial problem

Answer 2

For a.) I got .4461, I can't figure out b.) & c.) tho

Answer 3

woops i did it backwards

Answer 4

So your saying .4461 is incorrect for a.) ?

Answer 5

correct

Answer 6

Okay I'm guessing my calculations for a.) were incorrect, Thx dude

Answer 7

are you using a calculator ?

Answer 8

Ya ti-84

Answer 9

They were wrong, thx anyway buddy

Answer 10

which one was wrong

Answer 11

a.)

Answer 12

No biggie tho

Answer 13

why, i checked it

Answer 14

what is the correct answer. is b) and c) correct

Answer 15

Yup b & c were good

Answer 16

My math software gave me an x on a.) for some reason

Answer 17

what did you put in again

Answer 18

.4822
.5711
.1157

Answer 19

try .4822

Answer 20

no it was .4823

Answer 21

because it said round to the fourth decimal

Answer 22

Okay lemme try that, holn on

Answer 23

Still wrong for some reason

Answer 24

.4823

Answer 25

did you try .4461

Answer 26

try that, that might work. i solved it differently this time

Answer 27

.4461

Answer 28

Okay hold on

Answer 29

I knew it, yup that works, I wasn't sure & wanted to double check my work yes it was .4461

Answer 30

ok i think i see why, the other two answers are wrong too that i did, i think