Question

Lucas is applying to both Stanford and Cal-poly. The probability that he gets accepted to Stanford is 0.4. The probability that he gets accepted to Cal-Poly is 0.3. The probability that he is accepted to both schools is 0.15.

a) What is the probability that he is accepted to one of the two schools?
b) What is the probability that he does not get accepted at either school?

Answer 1

@ash2326 ?

Answer 2

got this as my answer: (a) .7/.15 = (4.67)

(b) .8/.15= (5.3)

is that it?

Answer 3

just a min. I'll check it

Answer 4

ok

Answer 5

Probability of getting accepted in one=P(stan)+P(cal)-P(both)=0.4+0.3-0.15
Can you find that now?

Answer 6

Is it .1-0.15?

Answer 7

0.4+0.3-0.15=0.55

Answer 8

nm, is it : .55

Answer 9

yes

Answer 10

ok cool:) now, b?

Answer 11

just a min

Answer 12

ok

Answer 13

sorry. I made a mistake in a, let me check again
:(

Answer 14

ok

Answer 15

For a
Probability of getting accepted in one=P(stan)+P(cal)-2*P(both)=0.4+0.3-2*0.15 = 0.4

Answer 16

ok!

Answer 17

b?

Answer 18

@ash2326

Answer 19

For b
Probability of getting accepted in none=1-(P(stan)+P(cal)-P(both))=1-(0.4+0.3-0.15) = 0.45

Answer 20

thank you!!!!!